Asked by Heidi

The time taken by a man to deliver milk is normally distributed with, mean 12 minutes and standard deviation 2 minutes. He delivers milk everyday estimate the probability that he takes.
(a) longer than 17 minutes
(b) between 9 and 13 minutes
Answered by MathMate
Calculate Z=(x-μ)/σ
and look up the normal distribution table for the probabilities.
Answered by rodel
0.75
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