An engineer is going to redesign ejection seat for airplane. The seat was designed for the pilots weighing between 130 lb and 181 lb. the new population of pilots has normally distributed weights with the mean of 135 lb and the standard deviation of 26.2 lb.
A.) If the pilot is randomly chosen, find the probability that his weight is between 130 lb and 181 lb.
B.) If 40 different pilots are randomly selected, find the probability that their mena weight is between 130 lb and 181 lb.