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The time taken for a standard flight from Melbourne to Sydney is normally distributed with a...

The time taken for a standard flight from Melbourne to Sydney is normally distributed with a mean of 75mins and a standard deviation of 7mins.

a) What is the probability of a flight taking longer than 80mins?
b) If there are 500 flights from Melbourne to sydney each week, how many of these will take more than 80mins?

Math   Statistics-And-Probability   
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