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Assume that the age at onset of a certain disease is distributed normally with a mean...

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Basic Math

Assume that the age at onset of a certain disease is distributednormally with a mean of 43 years and a variance of 177.69years.

a) What is the probability that an individualafflicted with the disease developed it before age 31?
probability =  

b) What is the probability that an individualafflicted with the disease developed it after age 48?
probability =  

c) What is the probability that an individualafflicted with the disease developed it between ages 31 and48?
probability =  

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