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15 September, 13:11

Events A and B are independent. Find the indicated probability. Show your work!

a. P (A) = 0.3, P (B) = 0.5, P (A and B) = ?

b. P (A) = ?, P (B) = 0.9, P (A and B) = 0.45

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  1. 15 September, 13:40
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    P (A) = 0.3

    P (B) = 0.5

    P (A and B) = 0.3 * 0.5

    P (A and B) = 0.15

    P (A) = x

    P (B) = 0.9

    P (A and B) = x · 0.9

    0.45 = 0.9x

    0.9 0.9

    0.5 = x

    P (A) = 0.5
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