問題詳情
303. An experiment consists of tossing three fair coins and is deemed a success if the result is three heads or three tails. The experiment is repeated until a success occurs.
Calculate the probability that it takes exactly three experiments to obtain a success.
(A) 0.047
(B) 0.070
(C) 0.141
(D) 0.188
(E) 0.422
參考答案
答案:C
統計:A:0,B:0,C:0,D:1,E:0
難度:計算中