Unit 3 Probability Review

Pam has 18 gold medals, 9 silver medals, and 9 bronze medals in a box.  She will choose one of these medals at random.  Which statement about Pam’s choices is true?

• Pam is half as likely to choose a bronze medal as a gold medal.

• Pam is twice as likely to choose a gold medal as a bronze medal.

• Pam is as likely to choose a bronze medal as a silver medal.

• All of the above are true.

Tags

CCSS.7.SP.C.7B

Tori won a prize for a chance to pull out of a grab bag at the school carnival. 

The bag contains:

6 red bracelets

4 yo-yo’s

3 sticky hands

7 kazoos

  What is the probability that Tori will pull out a bracelet put it back in the bag and then pull out a kazoo?

• A.) 6/20

• B.) 4/20

• C.) 3/50

• D.) 1/2

A cooler has Capri Suns, Dr. Peppers, waters and Sprites. If Jacqueline reachers in and randomly chooses a drink, she has a 1/3 chance of selecting water. If there are 45 drinks in the cooler, how many of them are waters?

• A.) 15

• B.) 20

• C.) 45

• D.) I don't know

Tags

CCSS.7.SP.C.7B

A bag of candy contains 2 Hershey bars, 4 Starburst, 3 Reese’s Pieces, and 3 Paydays.  What is the probability of NOT randomly choosing a Starburst?

• A.) 1/2

• B.) 2/3

• C.) 1/4

• D.) 1/3

The table below shows the survey results when students were asked their favorite core class was.

What is true about this table?

• A.) It is equally likely that students like English and History.

• B.) It is certain that all students like Math.

• C.) It is least likely that students like History.

• D.) It is most likely that students like Science.

Tags

CCSS.7.SP.C.5

Grace spun a spinner and her results are listed below.  Using the information for the table, if Grace were going to spin the spinner 180 times, how many times would you expect her to land in section 2?

• A.) 9

• B.) 3

• C.) 27

• D.) 32

Tags

CCSS.7.SP.C.6

Probability is defined as...

• ...the likelihood that an event will occur.

• ...a game that involves coins.

• ...a guarantee.

Tags

CCSS.7.SP.C.5

Find P(red marble)...

• 3/10
• 3/9
• 1/9
• 1/3

Tags

CCSS.7.SP.C.7B

A jar contains 2 pink, 6 red, and 4 blue marbles. If you pick one marble without looking, what is the probability that the marble you pick will be red or blue?

• 5/6
• 1/2
• 1/3
• 1/6

In a bag with 36 skittles, 12 are red, 9 are green, 3 are purple, 5 are orange, and 7 are yellow. What is the probability of pulling out a red skittle OR an orange skittle?

Tags

CCSS.HSS.CP.B.7