A population is normally distributed with = 100 and = 20. a. Find the probability

Question:

A population is normally distributed with μ = 100 and σ = 20.
a. Find the probability that a value randomly selected from this population will have a value greater than 130.
b. Find the probability that a value randomly selected from this population will have a value less than 90.
c. Find the probability that a value randomly selected from this population will have a value between 90 and 130.

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