問題詳情
4. An urn contains 10 balls: 4 red and 6 blue. A second urn contains 16 red balls and an unknown number of blue balls. A single ball is drawn from each urn. The probability that both balls are the same color is 0.44.
Calculate the number of blue balls in the second urn.
(A) 4
(B) 20
(C) 24
(D) 44
(E) 64
參考答案
答案：A
統計：A:1,B:0,C:0,D:0,E:0
難度：計算中