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Given a population with mean of 75 and standard deviation of 12. A simple random sample...

Given a population with mean of 75 and standard deviation of 12. A simple random sample of 36 is taken.

Find the following probabilities A. P (ഥX > 77 ) = _____________ B. P ( 72 < ഥX < 78) = ______________

please help !!

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