Among the 16 used cars in Harry's lot, five have four-wheel drive. If three cars are randomly chosen for a newspaper ad, what is the pobability that all three will have four-wheel drive?

In a third-rate rock band, three members play guitar only, four singonly, and two do both. Six have no talent for singing or guitar, sothey do something else. How many members are in the rock band?

A new dormitory is to be constructed.  There will be three types of rooms: single rooms which accommodate just 1 student per room, double rooms which accommodate 2 students per room, and triple rooms which accommodate 3 students per room.  The dorm will contain 151 rooms and accommodate 262 students. Further, there will be 20 more double rooms than single rooms.  Find the number of each type of room. There will be  Blank 1. Calculate the answer by read surrounding text. single rooms. There will be  Blank 2. Calculate the answer by read surrounding text. double rooms. There will be  Blank 3. Calculate the answer by read surrounding text. triple rooms.

A shoe company wants to test an updated model of a running shoe on its wear after one month of running. Which of the following describes a matched pairs design? They recruit 50 people who run on a regular basis to participate in their study. They will have the runners wear the shoes when they run for two months. After two O The subjects are numbered 1-50, and these numbers are put into a random number generator. The first 25 random numbers, ignoring repeats, represent the subjects assigned to the new model group. The remaining 25 subjects will wear the original model. months, the wear on the shoes will be determined using the depth of the tread and flexibility of the toe box. The wear between the new model and the original model will then be compared. The subjects' names are written on equal-sized slips of paper and placed into a hat. A researcher then reaches in and pulls out 25 slips of paper. These subjects are assigned to the new model group. The remaining 25 subjects will be…