X is a normally distributed random variable with mean 72 and standard deviation 22. Use calculator to find the probability indicated. a) P(78

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 31E
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X is a normally distributed random variable with mean 72 and standard deviation 22. Use calculator to find the probability indicated.

a) P(78<X<127) 

b) P(60<X<90)

c) P(X=80) *continuous

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