問題詳情

121. An urn contains four fair dice. Two have faces numbered 1, 2, 3, 4, 5, and 6; one has faces numbered 2, 2, 4, 4, 6, and 6; and one has all six faces numbered 6. One of the dice is randomly selected from the urn and rolled. The same die is rolled a second time.
Calculate the probability that a 6 is rolled both times.
(A) 0.174
(B) 0.250
(C) 0.292
(D) 0.380
(E) 0.417

參考答案

答案:C

統計:A:0,B:0,C:0,D:0,E:0

難度:計算中