Given a normal distribution with m = 82 and s^2 = 36, find the probability that X assumes a value less than 80 = more than 78 = between 75 and 90

A First Course in Probability (10th Edition)
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Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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 B. Given a normal distribution with m = 82 and s^2 = 36, find the probability that X assumes a value

  1. less than 80 =
  2. more than 78 =
  3. between 75 and 90 =
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