Question

Find the missing probability.

P(B)=12,P(A∩B)=740,P(A|B)=?
A. 1/2
B. 7/20
C. 7/40
D. 2/5

Answer 1

B. 7/20

Explanation:

P(A | B) = P(A∩B) / P(B) is the formula for conditional probability

= (7/40) / (1/2)

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= 7/40 * 2/1

=7/20