Let A and B be independent events with P(A) = 0.3 and P(B) = 0.4 Find
$P (\frac{A}{B})$ .

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Solution

We know that $P (\frac{A}{B}) = \frac{P (A \cap B)}{P (B)} = \frac{P (A) P (B)}{P (B)} \Rightarrow P (\frac{A}{B}) = \frac{0.12}{0.4} = 0.3$

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