In a photographic process, the developing time of prints may be looked upon as a random variable hav-ing the normal distribution with μ = 15.40 seconds and σ = 0.48 second. Find the probabilities that the time ittakes to develop one of the prints will be(a) at least 16.00 seconds;(b) at most 14.20 seconds;(c) anywhere from 15.00 to 15.80 seconds.

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In a photographic process, the developing time of
prints may be looked upon as a random variable hav-
ing the normal distribution with μ = 15.40 seconds and
σ = 0.48 second. Find the probabilities that the time it
takes to develop one of the prints will be
(a) at least 16.00 seconds;
(b) at most 14.20 seconds;
(c) anywhere from 15.00 to 15.80 seconds.
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