The weights of a certain population of young adult females are approximately normally distributed with a mean

Question:

The weights of a certain population of young adult females are approximately normally distributed with a mean of 132 pounds and a standard deviation of 15.

Find the probability that a subject selected at random from this population will weigh:

(a) More than 155 pounds

(b) 100 pounds or less

(c) Between 105 and 145 pounds

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