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In a box, there are 1 red ball, 4 purple balls and 95 green balls. Someone randomly selects 2 balls from the box without replacement
Quantity A
The probability that one of the two balls is red
Quantity B
The probability that both balls are purple
A显示答案
· 相关考点
6.4.4 条件概率
6.4.4 条件概率
以上解析由 考满分老师提供。
