If 90% of all people between the ages of 30 and 50 drive a car, find these probabilities for a sample of 20 people.
a. exactly 20 people drive a car.
b. at least 16 people drive a car.
c. at most 5 people drive a car.

David is standing on the sixth rung of a ladder while painting his house. which expressions represent a change in david’s position of 2 rungs on the ladder? choose exactly two answers that are correct. a. 6+2 b. 6-2 c. 2x6 d. 6/2