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19 August, 09:57

If p (a) = 1/3, p (b) = 2/5, and p (a ∪ b) = 3/5, then p (a ∩ b) =

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  1. 19 August, 12:18
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    P (a ∪ b) = p (a) + p (b) - p (a ∩ b)

    p (a ∩ b) = p (a) + p (b) - p (a ∪ b)

    p (a ∩ b) = 1/3 + 2/5 - 3/5

    p (a ∩ b) = 2/15
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