Question

Find the missing probability. P(B)=1/2,P(A∩B)=7/40,P(A|B)=? A. 2/5 B. 7/20 C. 1/2 D. 7/40

Answer 1

Answer:

Option (B) : 7 / 20

Step-by-step explanation:

$P(A∩B)=P(B) \times P(A|B)$

$P(A|B) = \frac{P(A∩B)}{P(B)} = \frac{7}{40} \times \frac{2}{1} = \frac{7}{20}$