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A charted Accounted applies for a job in two firms X and Y. The probability of his being selected in firm X is 0.7 and being rejected at Y is 0.5...
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Let X be the event the he gets selected in the firm X and Y be the event the he gets selected in the firm Y.Let X‘ be the event the he is not selected in the firm X and Y‘ be the event the he is not selected in the firm Y.P(X U Y) = 1 − P(X‘ ∩...

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Solution

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Keynote

P(X U Y) = 1 − P(X' ∩ Y')P(X' U Y') = P(X') + P(Y') − P(X' ∩ Y')

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