問題詳情
128. In a group of 25 factory workers, 20 are low-risk and five are high-risk.
Two of the 25 factory workers are randomly selected without replacement.
Calculate the probability that exactly one of the two selected factory workers is low-risk.
(A) 0.160
(B) 0.167
(C) 0.320
(D) 0.333
(E) 0.633
參考答案
答案：D
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中