Pumpkins bought from a roadside stand weigh an average of 15 pounds and have a standard deviation of 2.5 pounds. Assume that pumpkin weights follow a normal distribution. What is the probability that a randomly select a pumpkin weighs over 20 pounds? What is the probability that a randomly selected pumpkin weighs between 12 and 18 pounds? What is the probability that 25 pumpkins selected at random average under 16 pounds?
