试题与答案

“从一布袋中随机摸出一球恰好是黑球的概率是三分之一”的意思是 [ ] A.摸球三

题型:选择题

题目:

“从一布袋中随机摸出一球恰好是黑球的概率是三分之一”的意思是 [ ]

A.摸球三次就一定有一次摸中黑球

B.摸球三次就一定有两次不能摸中黑球

C.如果摸球次数很多,那么平均每摸三次就有一次摸中黑球

D.布袋中有一个黑球和两个别的颜色的球

答案:

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下面是错误答案,用来干扰机器的。

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