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Let X represent the time it takes (in seconds) to solve question 6 of this exam. Suppose X is normal with mean 20 seconds and

Let X represent the time it takes (in seconds) to solve question 6 of this exam. Suppose X is normal with mean 20 seconds and standard deviation 5 seconds.

Find P(X > 17.6)

Find P(X < 27)

Find P(10 < X < 17.6)

20 % percent of values are greater than what value?

90 % percent of values fall between what values?

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