pre-hs Probability Based on the table, which bill has an experimental probability of next? A) $10 B) $15 C) $1 D) $20

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1 1. Peter picks one bill at a time from a bag and replaces it. He repeats this process 100 times and records the results in the table. Based on the table, which bill has an experimental probability of next? for being drawn from the bag A) $10 B) $15 C) $1 D) $20 2. Three families are playing a board game and need to form teams of 3 players with 1 player from each family. How many different teams containing 1 member from each family could be formed? A) 9 B) 3 C) 18 D) A regular card deck contains 52 cards, 4 of which are aces. Assuming the cards are dealt randomly, what is the probability that the first card dealt will be an ace? 4. Joan and Barry are candidates for class president. Orville, Sally, Consuela, Harry, and Rebecca are candidates for vice president. Sam, William, and Frederica are candidates for secretary. How many different combinations of president, vice president, and secretary are possible? A) 40 B) 11 C) 18 D) 30

2 5. The rosebushes in Pattie s Plant Store have the following colors: 20% yellow blooms 50% red blooms 30% pink blooms If George selected a rosebush at random today, what is the probability that it will produce yellow blooms? 6. In a random survey, 25 out of 150 people were able to give a correct answer to the question asked. If 500 people are surveyed, about how many would be expected to answer the question correctly? A) 20 B) 83 C) 325 D) 4 7. The chart shows the pizza menu for the local pizza parlor. Which of the following shows the total number of ways Andy can buy a pizza with one topping? A) (4 4) + 3 B) (4 3) + (4 3) C) D) These cards are used to play a game between two players. If Sally draws one card at random, what is the probability it will be a card with a star? 9. The six faces of a fair cube are numbered 1 through 6. If the cube is rolled 300 times, what is the expected number of times a 5 will land face-up? A) 250 B) 50 C) 100 D) 200

3 10. A bag contains 12 marbles: 5 are orange, 3 are blue, and the rest are red. If one marble is selected at random from the bag, what is the probability that it will be red or blue? 11. An ice-cream parlor makes sundaes with chocolate or vanilla ice cream and strawberry, chocolate, or caramel topping. Which tree diagram shows all possible combinations of sundaes with one flavor of ice cream and one topping? A) C) B) D) 12. This shows all the different ways a pair of number cubes can land in a game Robbie is playing. To win on his next turn, he needs to roll an 8. What is the probability that Robbie will win on his next turn? 13. A deck of 50 cards for a math game has 9 red cards, 13 blue cards, 18 green cards, and 10 yellow cards. What is the probability that a card randomly selected from the deck will be a blue card? A) 26% B) 87% C) 13% D) 74% 14. At Van s Video Store, 30% of the children s movies are animated. If a customer randomly chooses one children s movie, what is the probability that the movie he chooses will be animated?

4 15. A summer camp offers different choices at lunch. How many different lunch combinations consisting of 1 main dish, 1 side dish, and 1 drink are possible? A) 9 B) 27 C) 18 D) Students at Wilson Middle School must choose one elective from each group in the table. Which tree diagram shows all possible combinations of choosing one elective from each group? A) C) B) D)

5 17. Ivan has a fair number cube numbered 1 through 6. He will roll the cube one time. What is the probability that the number shown on the top face is a 2? 18. Mark has a basket of 40 yellow tennis balls and 35 white tennis balls. What is the probability that the next tennis ball he randomly chooses will be yellow? 19. Lewis restaurant offers a dinner special that consists of a main dish, a vegetable, a salad, and a roll. Lewis has 4 main dishes, 7 vegetables, 1 salad, and 1 type of roll to choose from. Which shows the total number of different dinner special combinations that Lewis offers? A) B) C) D) Jackie is in a fashion show at school. For her first outfit she may choose from 3 different colored shirts, 2 pairs of pants, and 3 pairs of shoes. From how many different possible outfits of 1 shirt, 1 pair of pants, and 1 pair of shoes can Jackie choose? A) 18 B) 8 C) 3 D) On your first draw, what is the probability of drawing a red card, without looking, from a shuffled deck containing 6 red cards, 6 blue cards, and 8 black cards? A) 20% B) 30% C) 10% D) 40% 22. A package contains 7 bags of tortilla chips, 3 bags of cheese puffs, 4 bags of potato chips, and 6 bags of corn chips. If Steve reaches into the package and selects one bag without looking, what is the probability he will choose potato chips? 23. Dave is a member of a bowling league. The table below shows his record for the last 10 games (100 frames) he bowled. Based on his previous record, what is the probability that Dave will bowl a strike in the next frame?

6 24. How many of the sections of the spinner shown above should be colored blue in order to make the probability of the arrow landing on blue in a single spin? A) 1 B) 7 C) 3 D) How many different ways could Lisa arrange these four stickers in this rectangle? A) 12 B) 4 C) 24 D) For a trip, Tyler packed one red sweater, one striped blouse, one white blouse, one blue skirt, and one black skirt. Which shows all the possible ways that she could combine one sweater, one blouse, and one skirt? A) C) B) D)

7 27. The spinner below is used in a game. In a single spin, what is the probability of the arrow landing on a Green or Blue space? 28. This is a standard set of dominoes. The dominoes are turned over and shuffled thoroughly, and one is chosen at random. What is the probability that the total number of spots showing on the one chosen will be greater than 6? 29. These are the sides of a number cube used in a game. Sam will win the game he is playing if he gets a number less than 3 the next time he rolls the number cube. What is the probability that Sam will win the game on his next roll?

8 30. A spinner consists of six equal regions as shown. If Harrold spins the spinner once, what is the probability that the arrow will land on a region numbered less than or equal to 2? 31. During an experiment, Roscoe tossed a fair coin 10 times and got 6 heads. What is the probability the coin will land showing heads on Roscoe s next toss? 32. Jill is playing a game with a spinner like the one pictured below. If the sections are congruent, what is the probability that on Jill s next spin the arrow will land on a section labeled red?

9 33. In a bag of candies there are 13 red candies, 13 green candies, 13 yellow candies, and 13 blue candies. If you choose 1 candy from the bag, what is the probability the candy will not be blue? 34. The table shows all of the possible outcomes when Juan tosses a penny, a nickel, and a quarter at the same time. What is the probability that Juans s result will be 3 tails on his first toss? 35. During basketball practice, Jada attempted 52 free throws and made 16 of them. Based on that rate, what is the probability that she will make the next free throw she attempts? 36. Rocky has a chance of winning a trip to New York City. Which of the following best describes Rocky s chances of winning the trip? A) It is certain that Rocky will win the trip. B) It is likely that Rocky will win the trip. C) It is unlikely that Rocky will win the trip. D) It is impossible that Rocky will win the trip. 37. In Happy Hills Pond, 2 out of 5 fish are goldfish. If 40 fish were randomly chosen from the pond, which is most likely the number of goldfish chosen? A) 37 B) 24 C) 8 D) 16

10 38. Sandra has a bag of same-sized cookies. The number of cookies and the different animal pictures on the cookies are listed below. 9 lion 5 elephant 3 tiger 9 bear Sandra will choose one cookie at random. What is the probability that the first cookie Sandra chooses will have a picture of a tiger? 39. A store manager displayed the number of bottles of suntan lotion sold during several months in this bar graph. What percent of the total number of bottles of suntan lotion sold in June, July, and August was sold in July? A) 30% B) 48% C) 32% D) 40%