17-12-2022
Mathematics

contestada

1. The running times for a group of 200 runners to complete a one mile are normally
distributed with a mean of 6.5 minutes and a standard deviation of 1.5 minutes.

a) approximately how many of the runners have a time greater than eight minutes?

b) what percentage rounded to the nearest 10th of these runners can complete this run less than 3.5 minutes?

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