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Mathematics, 19.10.2021 21:10 imalexiscv

If P [X] = 0.5 , P [X U Y] = 0.9 and P [X|Y] = 0.4 , so P[Y]?

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If P [X] = 0.5 , P [X U Y] = 0.9 and P [X|Y] = 0.4 , so P[Y]?...
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