A dice is rolled 4 times. What is the probability of rolling a 2 four times in a row?
(1/6)*(1/6)*(1/6)*(1/6) = (1/1296)
100
At the racetrack, there are 20 horses racing. What is the probability of the #7 horse or the #9 horse winning?
(1/20)+(1/20) = (1/10)
200
A batter faces 4 pitches in an at-bat, what is the probability of the pitcher throwing 1 ball, then 3 straight strikes?
(1/2)*(1/2)*(1/2)*(1/2) = (1/16)
200
While on a flight, there is a crying child in one of the 23 rows. What is the probability that the crying child is seated in row in front of you, or in back of you?
(1/23)+(1/23)= (2/23)
300
When ordering pizza, the customer has 5 places to choose from one such being Pizza Hut. They also have 4 kinds to choose from, one being Cheese. What is the probability of a customer ordering a Cheese pizza from Pizza Hut?
(1/5)*(1/4) = (1/20)
300
There are 7 different colored plates in the cupboard, what is the probability of you grabbing a red, green, or blue plate?
(1/7)+(1/7)+(1/7) = (3/7)
400
In a deck of 52 cards, what is the probability of picking a face card, and then a card of 6 or less? (Aces = 1)
(12/52)*(24/52) = (18/169)
400
Out of 15 tests in the class, there were 4 C's, 7 B's, and 4 A's. What is the probability you got an A or a B on the test?
(7/15)+(4/15) = (11/15)
500
A combination lock with 3 wheels, that are each labeled 0 to 9, no digits repeating. What is the probability of someone guessing the correct combination?
(1/10)*(1/9)*(1/8) = (1/720)
500
There are 1000 tickets in a raffle, you put in 16 and your friend put in 14. What is the probability you or your friend wins the raffle?