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6 January, 11:04

Suppose P (A) = 0.9, P (B) = 0.6, and P (B|A) = 0.2. What is P (A|B)

A) 0.36

B) 0.45

C) 0.3

D) 0.6

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Answers (1)
  1. 6 January, 12:25
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    P (B|A) : P (A and B) / P (A)

    P (A and B) : P (A) •P (B) so 0.9 • 0.6 = 0.54

    P (A|B) : 0.54 / 0.9 = 0.6

    Answer: D) 0.6
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