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16 May, 18:20

If P (B) = 0.3, P (A and B) = 0.5, find P (A).

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  1. 16 May, 18:46
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    P (A) = 0.2

    Step-by-step explanation:

    P (A and B) = P (A) + P (B)

    since P (B) = 0.3 then replace P (B) for 0.3

    since P (A) + 0.3 = 0.5, then

    P (A) = 0.5 - 0.3

    P (A) = 0.2
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