Probability STAAR Review

In a survey 7 out of 8 dentists recommend a ProTooth toothbrush. Based on this information, which recommendation can the toothbrush company predict.

• 18 out of 24 dentists recommend our toothbrush

• 33 out of 40 dentists recommend our toothbrush

• 56 out of 64 dentists recommend our toothbrush

• 70 out of 88 dentists recommend our toothbrush.

At a pizza shop you can choose thick or thin crust, red or white sauce, and topping of pepperoni, cheese, ham, or vegetarian. If you can only choose 1 item from each category, how many combinations are possible?

A basket of beads contains 8 red, 6 yellow, and 6 green beads. A bead will be drawn from the basket, replaced and then drawn again. What would be a reasonable predictions for the number of times a green marble will be pulled if you draw a 180 times.

Destini places the letters for the word OCTOBER into a bag. What is the probability she will select a B followed by an O, without replacing?

The spinner shown is spun two times in a row. What is the probability of spinning two prime number?

Aubrey has the following shirts in her drawer: 5 striped shirts, 6 solid shirts, 2 floral shirts, 2 polka dot shirts.

She will randomly choose 1 shirt at a time, replace it and choose again. What is the probability she will choose a polka dot shirt and then a striped shirt?

Neil goes to the pet shop to buy his dog something. The items he has to choose from are shown in the picture. What is the probability he will choose either a ball or a collar?

Students standing in line for a theme park were survey about their favorite rides. the results are shown in the table. Which statement below is true?

• Students are most likely to choose carnival games as their favorite

• Students are certain to choose roller coasters as their favorite

• Students are unlikely to choose live shows as their favorite

• Students are unlikely to choose carnival games as their favorite

A neighborhood HOA surveyed 40 residence about their feelings of safety in the neighborhood. THe results are in the table. Based on the information, predict how many neighbors out of 100 will feel safe or neutral?

The following playing cards are used in a game. What is the probability of not selecting a prime number?