试题与答案

For a group of n people, k of whom are of

题型:填空题

题目:

For a group of n people, k of whom are of the same sex, the expression  yields an index for a certain phenomenon in group dynamics for members of that sex. For a group that, consists of 20 people, 4 of whom are females, by how much does the index for the females exceed the index for the males in the group ?()

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A

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