A and B are two events. Suppose that P(A|B) = 0.5, P(B|A) = 0.4 and P(A∪B) = 0.84. Let P(A) = a , where a > 0.
(a) Express P(A∩ B) and P(B) in terms of a.
(b) using the results in (a), or otherwise, find the value of a.
[ 毒吻皇后在2011-04-19 19:33重新編輯此帖 ]