Probability STAAR Review

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

Tags

CCSS.7.SP.C.6

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

Tags

CCSS.7.SP.C.6

The manager of a movie theater randomly surveyed 50 people who entered the movie theater on Friday. The manager asked about the type of movie each person preferred. The results of the survey are shown in the table.

Based on the results in the table, which statement about a person who will go to this theater next Friday is true?

• The person is three times as likely to prefer comedy as horror.

• The person is twice as likely to prefer drama as horror.

• The person is less likely to prefer horror or drama than action.

• The person is more likely to prefer horror or comedy than action or drama.

Tags

CCSS.7.SP.A.2

A number cube with faces labeled from 1 to 6 was rolled 20 times. Each time the number cube was rolled, the number showing on the top face was recorded. The table shows the results.

Based on these results, what is the experimental probability that the next time the number cube is rolled it will land with 5 or 6 showing on the top face?

• $\frac{2}{5}$

• $\frac{3}{20}$

• $\frac{1}{3}$

• $\frac{3}{5}$

Tags

CCSS.7.SP.C.6

A classroom is arranged with 8 seats in the front row, 10 seats in the middle row, and 12 seats in the back row. The teacher randomly assigns seats to students as they enter the classroom.

What is the probability that the first student who enters the classroom will be assigned a seat in the front row?

• $\frac{2}{5}$

• $\frac{2}{3}$

• $\frac{4}{11}$

• $\frac{4}{15}$

Tags

CCSS.HSS.CP.B.9

The 200 students in a school band will attend an awards dinner. A random survey of 25 of these students was conducted to determine how many of each meal should be prepared for the dinner. The results of the survey are shown.

- 12 students want a beef meal.

- 8 students want a chicken meal.

- 5 students want a pasta meal.

Based on the survey results, which of these is the best prediction of the meals wanted by the 200 students?

• There are 16 students who want a beef meal.

• There are 52 students who want either a chicken meal or a pasta meal.

• There are 32 more students who want a beef meal than want a chicken meal.

• There are 24 more students who want a pasta meal than want a chicken meal.

Tags

CCSS.7.SP.A.2