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6. The annual rainfall in a certain region is a normal random variable with mean / = 50.0 cm, and standard deviation o = 10.0

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6. The annual rainfall in a certain region is a normal random variable with mean / = 50.0 cm, and standard deviation o = 10.0 cm. (a) With 80% chance, next year's annual rainfall will be at most r cm. What is r? Show your work. (b) What is the chance that in exactly 4 out of the next 5 years the annual rainfall will exceed 55.0 cm? Assume independent rainfall amounts in successive years

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