問題詳情
18. The assembly times for products in a factory are normally distributed with a mean of 15 minutes and a standarddeviation of 6 minutes. What is the probability that the assembly time of a randomly selected product will beexactly 15 minutes?
(A)1;
(B)0.5;
(C) 0.4;
(D) 0.
參考答案
答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增