SOLUTION: If P(A or B) = 0.7, P(A) = 0.3 and P(B) = 0.8, determine P(A and B). A. 0.21 B. 0.56 C. 0.10 D. 0.40

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Question 424582: If P(A or B) = 0.7, P(A) = 0.3 and P(B) = 0.8, determine
P(A and B).
A. 0.21
B. 0.56
C. 0.10
D. 0.40
Answer by sudhanshu_kmr(1152) About Me  (Show Source):
You can put this solution on YOUR website!

P(A AND B) = P(A) +P(B) - P(A OR B)
= 0.8 + 0.3 - 0.7
=0.4