Question: 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

  1. 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.

  1. Find P(X > 17.6)
  2. Find P(X < 27)
  3. Find P(10 < X < 17.6)
  4. 20 % percent of values are greater than what value?
  5. 90 % percent of values fall between what values?

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