1. Suppose that 80 people must take a certain medication in order for one person to be helped. What is the absolute risk reduction of the intervention?
2. License Plate Game Johnny and Doyle are driving on a lightly traveled road. Johnny proposes the following game: They will look at the license plates of oncoming cars and focus on the last two digits. For instance, the license plates ABC512 and 7412BG would yield 12, and the license plate XY406T would yield the number 6. Johnny bets Doyle that at least 2 of the next 15 cars will yield the same number. What is the probability that Johnny wins? Assume that each of the 100 possible numbers is equally likely to occur.
3. Parking Spaces Ten people randomly park their cars in a row of fourteen parking spaces. Then Mr. Jones arrives in a wide camper that requires two adjacent parking spaces. What is the probability that Mr. Jones will be able to park his camper?