An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 120lb and 181 lbs. The new population of pilots has normally distributed weights with a mean of 129 lbs and a standard deviation of 29.4 lbs. If a pilot is randomly slected, find the probability that his weight is between 120 lbs and 181 lbs, and If 36 different pilots are randomly selected, find the probability od theri mean weight is between 120 lbs and 181 lb

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