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Suppoe Colleen work two job. At job A, Colleen’ monthly earning can be decribed by the ditribution N(2100, 200) and at job B, her monthly earning can be decribed by the ditribution N(550, 70). Auming that her earning are independent,


1) What i the mean and tandard deviation of the TOTAL amount of money he earn in a month? (thi will ue knowledge from prior unit)

2) What i the probability that he earn more than $2750 in a given month?

Sagot :

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