SOLUTION: the time required to finish a test in normally distributed with a mean of 40 minutes and a standard deviation of 8 minutes. what is the probability that a student chosen at random

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Question 1143456: the time required to finish a test in normally distributed with a mean of 40 minutes and a standard deviation of 8 minutes. what is the probability that a student chosen at random will finish the test between 24 and 48 minutes
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z=(x-mean)/sd
z is between (24-40)/2 and (48-40)/2 or between -2 and 1.
That probability is 0.8186