a)the area to the right of 3.5 That's the correct choice, the probability that there are more than 3 passengers who do not show up for a flight. -------------------- b)the area to the left of 2.5 That's the probability that there are fewer than 3 passengers who do not show up for a flight. -------------------- c)the area to the right of 2.5 That's the probability that there are more than 2 passengers who do not show up for a flight. -------------------- d)the area to the left of 3.5 That's the probability that there are fewer than 4 passengers who do not show up for a flight. -------------------- e)the area between 2.5 and 3.5 That's the probability that there are EXACTLY 3 passengers who do not show up for a flight. Edwin