问题 解答题
掷两枚普通的正六面体骰子,所得点数之和的所有可能如下表所示:
第1枚和第2枚123456
1234567
2345678
3456789
45678910
567891011
6789101112
(1)求出点数之和是11的概率;
(2)你认为最有可能出现的点数之和是多少?请说明理由.
答案

(1)P(点数之和是11)=

2
36
=
1
18
.(4分)

(2)最有可能出现的点数之和是7.(6分)

∵在所有可能出现的点数之和中,7是众数.(8分)

或:P(点数之和是7)=

1
6
,(7分)

是所有可能出现的点数之和的概率的最大值.(8分)

阅读理解


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