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5.) X is a random variable which is normally distributed with mean of 20 and standard deviation of a. What is the probability P(X

5.) X is a random variable which is normally distributed with mean of 20 and standard deviation of a. What is the probability P(X <19)? 4.b) Y is a random variable which is normally distributed with mean of 200 and variance of 100. 16 different measurement are taken from Y. What is the probability that the average of these sixteen measurements will be less than 205?

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