Topic 7 Review; 7th grade

The random numbers represent 10 trials of a simulation.

The number 0-7 represent students who watched television last night, and the numbers 8 and 9 represent students who did not. Based on the simulated data, what is the probability that exactly 2 out of a group of 4 randomly selected students watched television last night?

The yearbook club is handing out T-shirts to its members. There are 5 blue, 7 green, 9 red, and 4 yellow T-shirts in all. If Jacob is handed a T-shirt, what is the probability that the color is red?

A spinner has six equal-sized sections numbered 1, 1, 2, 2, 3 and 4. What is the sample space for the spinner?

• 1, 2, 3, 4

• 4, 3, 2, 1

• 1, 2, 2, 3, 4

• 1, 1, 2, 2, 3, 4

A spinner has six equal-sized sections numbered 1, 1, 2, 2, 3 and 4. What is the probability of spinning a 1?

• 0.25

• 0.33

• 0.20

• 0.35

A game has 15 balls for each of the letters B, I, N, G, and O. The table shows the results of drawing balls 1,250 times.

For which letter is the experimental probability closest to the theoretical probability?

• B

• I

• N

• G

• O

Four people (Rob, Sonja, Jack and Ang) enter their names into a drawing. The winner receives either a t-shirt or a mug, and which prize they receive is randomly selected.

What is the probability that either Ang wins and is given a mug, or Jack wins (and is given either prize)?

Write the answer as a percent rounded to the nearest tenth.

In a game of chance, players spin the pointer of a spinner with six equal sized sections. The outcomes of the game are shown in the table.

Which outcome has a frequency closest to its expected frequency?

• 1

• 2

• 3

• 4

Hal records the number of winners of 3 Ring Toss games in the table.

Based on the data, how many winners should Hal expect if there are 750 players?

To play a game, a number cube with sides numbered 1 through 6 is rolled and a fair coin is flipped. What is the probability of flipping a head AND rolling either a 3 or a 5?

Write a percent rounded to the nearest tenth.

In a school contest, each student draws a number from 1 to 5 at random out of a large basket. The outcomes are shown in the table.

Based on the data, what is the expected probability of drawing a 3?

Write your answer as a fraction __/__