A random variable follows the normal probability distribution with a mean of 80 and a standard...

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A random variable follows the normal probability distribution with a mean of 80 and a standard...

A random variable follows the normal probability distribution with a mean of 80 and a standard deviation of 20. What is the probability that a randomly selected value from this population

a) is less than 90?

b) is less than 65?

please spell the steps involved in calculations. Show all work

math Statistics-And-Probability

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