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Nitella [24]
3 years ago
6

Let A and B be events with P(A) = 0.61 and P(A ∩ B) = 0.39. For what value of P(B) will A and B be independent?

SAT
1 answer:
timofeeve [1]3 years ago
7 0

Answer:

P(B) = 0.64

Explanation:

Given

P(A) = 0.61

P(A\ n\ B) = 0.39

Required

Determine P(B)

If A and B are independent, then:

P(A\ n\ B) = P(A) * P(B)

Substitute values for P(A) and P(A n B)

0.39 = 0.61 * P(B)

Make P(B) the subject

P(B) = \frac{0.39}{0.61}

<em />P(B) = 0.64<em> --- approximated</em>

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