You have 20 shirts in your closet. 4 blue, 7 red, 3 green and 6 black. you pick one without looking. what is the probability that you pick a blue or black shirt?

18 of the last 30 cars that passesd you were black. what is the probability the next car will be black?

five out of 8 bags of m& ms had exactly 32 pieces in them. how many bags out of 40 should have exactly 32 pieces?

there are 18 girls and 12 boys in your class. what is the probability that a new kid entering your class will be a boy?

barb ate six cheeseburgers in the last four months. how many do you predict she will eat in two years?