問題詳情

94. A fair die is rolled repeatedly. Let X be the number of rolls needed to obtain a 5 and Y the number of rolls needed to obtain a 6.
Calculate E(X | Y = 2).
(A) 5.0
(B) 5.2
(C) 6.0
(D) 6.6
(E) 6.8

參考答案

答案：D

統計：A:0,B:0,C:0,D:0,E:0

難度：計算中