Counting Methods
Probability
Theoretical Probability
Experimental Probability
Adding Probabilities
100
Think about 5 different colors of containers and 5 different colors of lids. How many container-and-lid outcomes are possible?
What is 25 combinations?
100
There are 8 items in a grab bag. Two are red items, two are blue items, two are green items, and two are purple items. What is the probability that the first item would be green?
What is 1/4?
100
Say that you have three green tiles, three blue tiles, and four red tiles. What is the theoretical probability that a red tile will be picked without looking?
What is 2/5?
100
Robert got a hit on 20 of his 50 at-bats. What is the experimental probability that Robert will get a hit in his next ten at-bats?
What is 40%?
100
Suppose you have a six-sided die. What is the probability that you will toss an even number die or a composite number?
What is 5/6?
200
Use these letters and numbers: A,E,I,O,U and 2,4,6,8. How many pairs of one letter and one number can you make?
What is 20 pairs?
200
There are 8 items in a grab bag. Two are red items, two are blue items, two are green items, and two are purple items. What is the probability of picking a red or purple item?
What is 1/2?
200
If you toss a number cube (1-6) 360 times, how many times would you expect to get a number less than four?
What is 180 times?
200
Three girls are playing a video game. Angie has won 30 games, Emily has won 7, and Gina has won 13. What is the experimental probabilities that each girl will win the next game?
What is 3/5, 7/50, 13/50?
200
Suppose you have a six-sided die. What is the probability of tossing an odd number die or a multiple of three?
What is 5/6?
300
The cafeteria lunch menu has 5 main courses meals, 4 beverages, and 3 salads. How many possible outcomes for one main course meal, one beverage, and one salad does this menu have?
What is 60 outcomes?
300
There are 8 items in a grab bag. Two are red items, two are blue items, two are green items, and two are purple items. On your first pick, assume that you picked a blue item. What is the probability that a blue item or green item will be picked next?
What is 3/7?
300
Suppose that you have 117 balls. Twenty of them of are blue, 45 of them are red, 36 of them are white, and 16 of them are green. What is the theoretical probability in percent that a white, green, red, or purple will be chosen without looking?
What is 83%?
300
John is playing Penny Toss at the school fair. He has tossed the penny twenty times, and he made it on the plate eight times. What is the experimental probability that the next throw will land on the plate?
What is 40%?
300
Sammy puts 2 Red marbles, 3 blue marbles and 5 green marbles in a bag. What is the probability of picking a Red or a Blue marble?
What is 50%?
400
The students on the school spirit committee are selling pennants. The color choices are red or green, the size choices are small or large, and the design choices are pole or rivets. What is the total number of possible choices of pennants they can sell?
What is 8 possible choices?
400
Say that you have a spinner with 10 slots. 4 are blue, 3 are green, 2 are white, and one is purple. What is the probability in percent that an orange slot or a green slot is chosen?
What is 30%?
400
What is the theoretical probability in decimal form rounded to the nearest hundredth that you will pick a quarter without looking if you have 3 dozen quarters, a dozen dimes, 5 dozen pennies, and 7 dozen nickels?
What is 0.19?
400
John is playing Penny Toss at the school fair. He has tossed the penny twenty times, and he made it on the plate eight times. In the next ten throws of the Penny Toss, how many pennies can John expect to land on the plate?
What is 4 pennies?
400
Sammy puts 2 Red marbles, 3 blue marbles and 5 green marbles in a bag. What is the probability of picking a Red or a green marble?
What is 70%
500
Name three different counting methods.
What is tree diagram, organized list, and multiplication?
500
Daniel was playing Deal or No Deal and he had 23 cases left. Three of the cases had $100,000. What is the probability of Daniel picking one of these $100,000 cases?
What is 13%?
500
Say you have 13 dozen black marbles, 47 blue marbles, and 13 red marbles. What is the theoretical probability in a fraction, decimal rounded to the nearest hundredth, and percent that a blue marble will be picked without looking?
What is 47/216, .22, and 22%?
500
Tommy made 44 free throws out of 55 free throws this season. What is the experimental probability that Tommy will make his next 5 free throws?
What is 80%?
500
Jerry has 3 chocolate cupcakes, 9 German chocolate cupcakes, four strawberry cupcakes, five dozen vanilla cupcakes and two dozen lemon cupcakes. What is the probability of picking a non-chocolate cupcake?
What is 88%?
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