Question

一道关于概率问题PA ＝0.7PB＝0.5 PA-B＝0.3 求PAB PB-A

Answer 1

P(A)＝0.7

P(B)＝0.5

P(A-B)＝0.3

P(AB)=P(A)-P(A-B)＝0.7-0.3=0.4

P(B-A)=P(B)-P(AB)＝0.5-0.4=0.1