Probability STAAR Review

Jack tossed a coin three times. Which tree diagram shows all the possible outcomes of the coin landing heads up or tails up?

• Diagram F

• Diagram G

• Diagram H

• Diagram J

A survey showed that 8 out of 20 homeowners in a neighborhood had cable television. If there were 320 homeowners in the neighborhood, how many could be expected to have cable television?

• 128

• 64

• 80

• 160

Vincent flipped three coins during a probability experiment. The outcomes of the first 40 trials are shown in the table.

Based on the information in the table, in how many of the next 120 trials will the outcome be exactly two of the coins showing heads?

• 60

• 87

• 39

• 48

A deck of cards contains 12 cards with letters and 16 cards with numbers. A card is pulled from the deck at random and replaced. This process is carried out 14 times.

What is a reasonable prediction for the number of times a card with a letter should be chosen?

• 10

• 2

• 6

• 12

The spinner shown has eight congruent sections. The spinner is spun 120 times. What is a reasonable prediction for the number of times the spinner will land on an even number?

• 75

• 45

• 15

• 40

A student has a set of cards. Each card has a picture of one shape. the table shows the number of cards that have a picture of each shape. the student will randomly select one card from the set.

Which statement is true?

A teacher has a container of paper clips. She will randomly select one paper clip from the container.

• * The container has 8 pink paper clips.

• * The container has 14 purple paper clips.

• * The container has 12 yellow paper clips.

• * The container has 16 blue paper clips.

• Which statement is true?

A survey was given to 200 students about their favorite type of pet. The survey results are shown in the table.

Based on the results in the table, which statement about a randomly selected student is true?

• The student is equally likely to prefer any of the types of pet.

• The student is 5 times as likely to prefer a fish as to prefer a rabbit.

• The student is less likely to prefer fish than to prefer any other type of pet.

• The student is more likely to prefer a dog than to prefer any other type of pet.

A fair spinner is divided into sections of equal size. Each section contains the picture of a diamond, a star, or a triangle. Which statement about the result of spinning the arrow is true?

• It is more likely to land on a diamond than on a star.

• It is equally likely to land on a triangle, a star, or a diamond.

• It is 4 times as likely to land on a diamond as it is to land on a star.

• It is less likely to land on a diamond than on a star.

Which statement about the flavor of the potato chips chosen is best supported by the information in the table?

• The flavor is least likely to be plain.

• The flavor is twice as likely to be jalapeño as ranch.

• The flavor is equally likely to be plain, jalapeño, ranch, or cheese.

• The flavor is more than twice as likely to be cheese as it is to be ranch.