Probability

​ ​ ​ probability that is based on the actual results of an experiment

• theoretical

• experimental

probability that is based on expected or calculated results

• theoretical

• experimental

Brianna has a bag of marbles. There are 6 red, 7 white, 3 black, and 4 green marbles. Choose the statement that is FALSE.

• It is impossible that Brianna will draw a blue marble

• It is more likely that Brianna will draw a black marble than a green marble

• It is certain that she will draw either a red, white, black, or green marble

• It is unlikely that she will draw a black marble.

Brianna has a bag of marbles. There are 6 red, 7 white, 3 black, and 4 green marbles. What is the probability of choosing a red marble?

Brianna has a bag of marbles. There are 6 red, 7 white, 3 black, and 4 green marbles. What is the probability of choosing a black marble?

80 people draw a marble out of a bag and put it back. The results are: 34 red, 18 white, 9 black, and 19 green. What is the experimental probability of drawing a white marble?

The probability of pulling a green marble out of the bag is 20%. Predict how many times a green marble would be pulled after 50 times.

• 20 times

• 5 times

• 10 times

What is true about a probability model? (select all that apply)

• All the probabilities add up to 1

• They show the probability one event

• They have a sample space

• All the probabilities are greater than 1

Rachel plays a game by rolling two number cubes with sides numbered 1 through 6. There are 36 possible outcomes. To win the game, the sum of the numbers facing up must be 11. What is the probability that Rachel will win the game?

Rachel plays a game by rolling two number cubes with sides numbered 1 through 6. There are 36 possible outcomes. To win the game, the sum of the numbers facing up must be 3. What is the probability that Rachel will win the game?