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21-05-2018
Mathematics

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The human resources manager at a company records the length, in hours, of one shift at work, X. He crests the probability distribution below. What is the probability that a worker chosen at random works at least 8 hours?

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isabellaoliver4403 isabellaoliver4403

21-05-2018

Hello!

The words at least means that the worker needs to work 8, 9 or 10 hours. We can add probabilities, so we will add .6 (for those working 8 hours), .15 (for those working 9 hours) and .08 (for those working 10 hours) to get a total probability of .83.
Hope this helps!

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