9. Checking In A new study shows more than half of workers ages 55 and over do not check in at all while on vacation, while a whopping 62% of Millennial workers ages 18 to 34 check in with the office at least once or twice a week during their vacation.11 If n520 Millennials are randomly selected and asked if they checked in with the office while on vacation, use p5.6 to find the following probabilities:

a. Exactly 16 say that they check in at least once or twice a week while on vacation.

b. Between 16 and 18 inclusive say they check in at least once or twice a week while on vacation.

c. Five or fewer say they check in at least once or twice a week. Would this be an unlikely occurrence?