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【323480】2023九年级数学上册 第三章 概率的进一步认识1 用树状图或表格求概率练习(新版)北

时间:2025-01-16 18:37:32 作者: 字数:4914字
简介:


用树状图或表格求概率


1 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> .十字路口 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 的交通信号灯每分钟红灯亮30秒,绿灯亮25秒,黄灯亮5秒.当你抬头看信号灯时,是黄灯的概率为(  )

A. <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> B. <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> C. <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> D. <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a>

2.在两个布袋中分别装有三个小球,这三个小球的颜色分别为红色、白色、绿色,其他没有区别.把两袋小球都搅匀后,再分别从两袋中各取出一个小球,求取出两个相同颜色小球的概率是_______.

3.妞妞和她的爸爸玩“锤子、剪刀、布”游戏.每次用一只手可以出锤子、剪刀、布三种手势之一,规则是锤子赢剪刀、剪刀赢布、布赢锤子,若两人出相同手势,则算打平.

妞妞和爸爸出相同手势的概率是___________.

4.三个袋中各装有 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 个球,其中第一个袋和第二个袋中各有一个红球和一个黄球,第三个袋中有一个黄球和一个黑球,现从三个袋中各摸出一个球,则摸出的三个球中有 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 个黄球和一个红球的概 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 率为_________

5.已知函数 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> ,令 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> ,可得函数图象上的十个点.在这十个点中随机取两个点 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> ,则 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 两点在同一反比例函数图象上的概率是___________.

6.小明、小芳做一个“配色”的游戏.右图是两个可以自由转动的转盘,每个转盘被分成面积相等的几个扇形,并涂 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 上图中所示的颜色.同时转动两个转盘,如果转盘 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 转出了红色,转盘 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 转出了蓝色,或者转盘 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 转出了蓝色,转盘 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 转出了红色,则红色和蓝色在一起配成紫 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 色,这种情 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 况下小芳获胜;同样,蓝色和黄色在一起配成绿色,这种情 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 况下小明获胜;在其它情况下,则小明、小芳不分胜负.

1)利用列表或树状图的方法表示此游戏所有可能出现的结果;

2)此游戏的规则,对 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 小明、小芳公平吗?试说明理由.

Group 2








7.有2个信封,每个信封内各装有四张卡片,其中一个信封内的四张卡片上分别写有1234四个数,另一个信封内的四张卡片分别写有5678四个数,甲、乙两人商定了一个游戏,规则是:从这两个信封中各随机抽取一张卡片,然后把卡片上的两个数相乘,如果得到的积大于20,则甲获胜,否则乙获胜.

1)请你通过列表(或画树状图)计算甲获胜的概率.

2)你认为这个游戏公平吗?为什么?

答案 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a>1.A 2 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 3 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a>   4 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a>     5 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a>


6 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> .:用列表法将 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 所有可能出现的结果表示如下:

Line 26  转盘B

转盘A

(红,红)

(红,蓝)

(红,黄)

(蓝,红)

(蓝,蓝)

(蓝,黄)

(红,红)

(红,蓝)

(红,黄)

(黄,红)

(黄,蓝)

(黄, <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 黄)

所以,所有可能出现的结果共有12种. <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a>   

2)上面等可能出现的12种结果中,有3种情况可能得到紫色, <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 故配成紫色的概率是 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> ,即小芳获胜的概率是 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> ;但只有2种情况才可能得到绿色,配成绿色的概率是 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> ,即小明获胜的概率是 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> .而 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> ,故小芳获胜的可能性大,这个“配色”游戏对小明、小芳双方是不公平的. 

7. <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 解:1)利用列表法得出所有可能的结果,如下表:


1

2

3

4

5

5

10

15

20

6

6

12

18

24

7

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> 7

14

21

28

8

8

16

24

32

由上表可知,该游戏所有可能的结果共16种,其中两卡片上的数字之积大于20的有5种,所以甲获胜的概率为 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a>

2)这个游戏对双方不公平,因为甲获胜的概率 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> ,乙获胜的概率 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a> ,所以,游戏对双方是不公平的.


 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/53/" title="认识" class="c1" target="_blank">认识</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/428/" title="概率" class="c1" target="_blank">概率</a> <a href="/tags/946/" title="表格" class="c1" target="_blank">表格</a> <a href="/tags/947/" title="进一步" class="c1" target="_blank">进一步</a>



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