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Bill and George go target shooting together. Both shoot at the target at same time. Assume Bill hits the target with prob. 0.7, George, independently, hits target with prob. 0.4.

a) Now both of them shoot once and exactly one shot hits target. What is the prob. that it was George's shot?

b) Now both of them shoot once and target is hit. What is prob. that George hit it?

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