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The average time it takes to complete a certain task is 21 minutes with a standard...

The average time it takes to complete a certain task is 21 minutes with a standard deviation of 2 minutes. What is the probability that someone will require more than 22 minutes to complete the task?

Math   Statistics-And-Probability   
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Answer #1

Given that, mean = 21 minutes

standard deviation = 2 minutes

We want to find, P(X > 22)

Therefore, the probability that someone will require more than 22 minutes to complete the task is 0.3085

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