Posted by **Donna** on Saturday, February 11, 2012 at 4:36pm.

A construction company builds apartment buildings. The construction time follows a normal distribution with a mean time of 200 days and a standard diviation of 20 days. (a) What is the probability of completing a building in 224 days or less? (b) What is the probability that it will take between 210 and 224 days to complete a building?

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