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Mathematics , 21.06.2022 07:40

9. a)
The time taken for a standard flight from Sydney to Brisbane is normally distributed with a mean of 75 minutes and a standard deviation of 7 minutes.
What is the probability of a flight taking longer than 80 minutes?
b)
If there are 500 flights from Sydney to Brisbane each week, how many of these will take more than 80 minutes?

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