Probability Review

A spinner has 8 congruent sections. Timmy is going to spin the spinner one time. What is the probability that he will spin a 1 or a 3?

• $\frac{5}{8}$

• $\frac{3}{8}$

• $\frac{1}{2}$

• $\frac{1}{4}$

A survey was taken to ask students what their favorite food was. The results are shown above. A student is chosen at random. What is the probability that the student did NOT choose Cheeseburger?

• $\frac{4}{5}$

• $\frac{1}{5}$

• $\frac{1}{4}$

• $\frac{1}{20}$

The spinner shown has eight congruent sections. The spinner is spun 70 times. What is a reasonable prediction for the number of times the arrow will land on purple?

• 35

• 3

• 26

• 9

A jar contains:

6 blue marbles

3 red marbles

5 purple marbles

7 black marbles

4 yellow marbles

A marble will be drawn from the jar and replaced 65 times. What is a reasonable prediction for the number of times a black or blue marble will be drawn?

• 13

• 16

• 18

• 34

A number cube with faces labeled 1-6 was rolled 75 times. Each time a number cube was rolled, the number that was facing up 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 a 3 or a 5 showing on the top face?

• $\frac{13}{75}$

• $\frac{2}{5}$

• $\frac{17}{75}$

• $\frac{1}{3}$

Kelly has two bags of colored markers. Bag #1 contains 3 red, 5 blue, 6 black, and 1 yellow marker. Bag #2 contains 5 red, 3 blue, 4 black, and 3 yellow markers. Kelly will randomly select one marker from each bag. What is the probability that she will select a black marker from each bag?

• $\frac{1}{3}$

• $\frac{4}{15}$

• $\frac{2}{5}$

• $\frac{8}{75}$

David has two drawers. Drawer #1 has 4 blue shirts, 3 white shirts, 3 black shirts, and 5 grey shirts. Drawer #2 has 2 pair of green socks, 6 pair of white socks, and 4 pair of black socks. David is going to randomly select one shirt and one pair of socks. What is the probability that he selects a white shirt and a pair of white socks?

• $\frac{1}{5}$

• $\frac{1}{10}$

• $\frac{1}{2}$

• $\frac{1}{3}$

In a box of chips, there are:

3 salt and vinegar bags

4 barbecue bags

5 sour cream and onion bags

3 jalapeno bags

Wayne will pull out one bag of chips, not replace it, then pull out a second bag of chips. What is the probability that Wayne will select a barbecue bag of chips first, and then a jalapeno bag?

• $\frac{2}{35}$

• $\frac{4}{75}$

• $\frac{7}{29}$

• $\frac{7}{15}$

Ashton has a box of donuts. In the box there are 8 glazed, 4 chocolate iced, 6 sprinkled, and 2 filled donuts. If he randomly pulls out one donut, then doesn't replace it, then pulls out a second donut, what is the probability that both will be chocolate iced?

• $\frac{4}{95}$

• $\frac{3}{95}$

• $\frac{1}{25}$

• $\frac{1}{5}$

At an ice cream shop you can choose from the following:

Chocolate, vanilla, or strawberry

Sprinkles, or hot fudge

Bowl, waffle cone, dipped cone

You can select one item from each list. How many total possible outcomes are there?

Hint: Draw a tree diagram to help you see all the options.

• 8

• 3

• 18

• 10