Unit 7 Probability Review

A drawer contains different colored socks. A sock is randomly drawn from the bag.

- 6 black socks

- 9 white socks

- 2 navy socks 

-3 pink socks

What is the probability in decimal form that the sock will be either pink or navy? (Answer in Decimal Form)

• .25

• .5

• .33

• .20

A bag has 7 blue marbles, 2 purple marbles, 1 green marble. She will randomly choose 1 marble from the bag. What is the probability of drawing a purple marble?

• 1/5

• 2/5

• 7/10

• 1/10

A survey was taken at the mall and showed that 15 out of 50 people like to eat at the food court. If there were 350 people at the mall, how many people could be expected to NOT eat at the food court?

• 105 people

• 210 people

• 245 people

• 335 people

Elizabeth has a box of shapes. She randomly selects one from the box.

- 2 rectangles

- 5 circles

- 15 trapezoids

- 3 pentagons

Which statement is true?

• The probability of selecting a trapezoid is 2/5, The probability of not selecting a trapezoid is 3/5.

• The probability of selecting a trapezoid is 1/4, The probability of not selecting a trapezoid is 3/4.

• The probability of selecting a trapezoid is 1/15, The probability of not selecting a trapezoid is 14/15.

• The probability of selecting a trapezoid is 3/5, The probability of not selecting a trapezoid is 2/5.

Joshua is rolling a standard number cube and then flipping a coin for an experiment.

Which tree diagram shows all the possible outcomes for the experiment?

• 
• 
• 
• 

A spinner has 8 equal sections.

If the spinner is spun 64 times, how many times could you expect to spin green?

• 32 times

• 16 times

• 8 times

• 24 times

Kaif has a wallet of different bills. There are 6 five dollar bills, 6 ten dollar bills, and 8 twenty dollar bills. He will randomly select 2 bills from the wallet without replacement. What is the probability of pulling a ten dollar bill and then a twenty dollar bill?

• 12/95

• 7/50

• 1/48

• 7/10

You went to the store and bought 5 bags of M&M's. Each back contains 30 M&M's. She opened one bag of the M&M's and got 12 blue M&M's. 

Which statement about the M&M's in the remaining bags is best supported by this information?

• There will be no more than 40 blue M&M's.

• There will be between 45 and 70 blue M&M's.

• There will be at least 90 blue M&M's, but no more than 100.

• All 120 M&M's will be blue.

  All 120 M&M's will be blue.

The list below shows the sales from a candy store on a Tuesday.
 13 boxes of Nerds
 7 Starbursts
 10 bags of Twislers
 20 bags of M&M's
If the store sells 100 bags on Wednesday, which prediction is NOT supported based on the data in the table?

• The number of starburst sold will be 12 less than the number of nerds sold.

• The number of nerds sold will be 6 more than the amount of twislers.

• The number of M&M's sold will be 3 times the amount of starburst sold.

• There will be a total of 60 bags of Twislers and M&M's sold.

The table shows the types of movies and the number of DVDs rented by customers at a Red Box in one day.

Based on the data in the table, which statement about the movies is NOT true?

• It is more likely to get a Sci-Fi or Comedy movie than a Drama movie.

• It is less likely to get a comedy movie than a family movie.

• It is less likely to get a Sci-Fi movie than a Drama movie.

• It is more likely to get a Family movie than a Comedy or Drama movie.