Probability Review

An experiment of drawing a tile and then without replacing the first tile drawing another tile was performed 8 times. The results of the experiment are shown in the list below. {(BB), (BA), (AA), (BB), (AB), (AB), (AA), (BB)} Using the results from the test, what's the EXPERIMENTAL probability of drawing both A tiles from the bag?

• 2/5

• 1/4

• 1/8

• 1/5

A game is played where a die is rolled and a spinner is spun with numbers 1 through 4. To win, a player must roll a number greater than 3 on the die and spin a one on the spinner. What is the probability of this happening?

• ^½

• 1/8

• 1/4

• 1/24

Three quarters are flipped at the same time. What are the chances that all three quarters land on heads?

• 1/2

• 1/3

• 1

• 1/8

A coin is flipped and a fair six-sided number cube is rolled. If this experiment is completed 222 times, how many times can it be expected that the coin would be heads and the number cube would be a number less than 3?

• 200 times

• 37 times

• 74 times

• 50 times

Predict the number of times you would flip tails, select a red marble, and spin an even number if you did all three 120 times.

• 10

• 8

• 12

• 20

Donald has 4 marbles in a bag – two red, one blue, and one green. He draws one marble from the bag and without replacing it, he draws another marble. Which of the following represents all possible outcomes of this experiment?

• A

• B

• C

• D

At a school assemble, 7 out of 10 students carried their backpacks. If there were 700 students in the assembly, how many carried their backpacks?

• 1000

• 490

• 210

• 4900

Tags

CCSS.7.RP.A.3

If Ricky rolls a fair six-sided number cube, numbered 1 through 6, 18 times, how many times should Ricky expect to roll a number greater than 4?

• 3 times

• 6 times

• 9 times

• 12 times

Jessica is conducting an experiment using two bowls of marbles. She reaches into each bowl, draws a marble from each bowl, records the result, and returns each marble to its respective bowl. She repeats this experiment 20 times. Her results are shown in the tables below.Based on these results, predict the number of times Jessica will draw a purple marble from Bowl 1 and a white marble from Bowl 2 if she repeats the experiment 200 times.

• 10 times

• 12 times

• 20 times

• 100 times

Bobby had a box of berry flavored hard candies. Fifteen candies were strawberry flavored, twelve candies were blueberry flavored, and thirteen candies were raspberry flavored. Bobby picked one candy from the box without looking. What is the probability, written as a percent, that the candy he picked was not raspberry flavored?

• 67.5%

• 32.5%

• 27%

• 13%