Probability

There are 25 counters in a bag: 6 red,
4 white, 7 blue, and 8 yellow. You choose one counter at random. Which color are you least likely to choose? 

• white 
• blue 
• red 
• yellow

Michael recorded the color of each car that passed by his office. He saw 30 blue cars and 40 green cars. Which of the following shows an accurate prediction or comparison? 

• Out of 7 cars, Michael will see 3 blue cars and 4 green cars. 
• Out of 70 cars, half of the cars Michael sees will be blue and half will be green. 
• Out of the cars, Michael will see more blue cars than green cars. 
• Out of 10 cars, Michael will see 3 blue cars. 

Tags

CCSS.6.RP.A.3A

Two number cubes each have sides labeled 1 to 6. Ann rolls both number cubes. On the first roll, the sum of the numbers was equal to 10. On the second roll, the sum of the numbers was equal to 7. Which sum is more likely to occur? 

• sum of 10
• sum of 7 
• neither are likely 
• they are equally likely 

Tags

CCSS.7.SP.C.5

Mari Bought 6 packets of tomato seed. Each packet contained 24 seeds. She planted 1 packet of seeds, and 15 seed sprouted.

Which statement about the seeds in the reaming packets is best supported by this information?

• No more than 50 seeds will sprout.

• Between 50 and 100 seeds will sprout

• At least 100 but no more than 120 seeds will sprout

• all 120 seeds will sprout

A store manger receives a delivery of 2 boxes of lightbulbs. Each box contains 25 lightbulbs. The store manger tests all the lightbulbs and find that 2 of them are defective. Based on these results, What can the store manger predict about the next delivery of lightbulbs?

• A delivery of 3 boxes will contain 3 more defective lightbulbs than a delivery of 2 boxes

• A delivery of 4 boxes will contain 2 more defective lightbulbs than a delivery of 2 boxes

• A delivery of 5 boxes will contain 10 more defective lightbulbs than a delivery of 2 boxes

• A delivery of 6 boxes will contain 3 more defective lightbulbs than a delivery of 2 boxes

Tags

CCSS.5.OA.B.3

The manger of a movie theater randomly surveyed 50 people who entered the movie theater on Friday. The manger asked about the type of movie each person preferred. The results of the survey are shown below

Horror- 12 People

Comedy- 15 People

Action- 17 People

Drama- 6 People

Based on the result above, Which statement about a person who will go to this theater next Friday is true?

• The person is three times as likely to prefer comedy as horror

• The person is twice as likely to prefer drama as horror

• The person is less likely to prefer horror or drama than action

• The person is more likely to prefer horror or comedy than action or drama

Tags

CCSS.6.RP.A.3B

For the entire 7th grade class of 250 students. How many would you expect to like fried chicken best?

• 23 Students

• 35 Students

• 25 Students

• 50 Students

Tags

CCSS.7.SP.C.6

Find the theoretical probability of NOT landing on yellow if you spin the spinner.

• 1/8
• 7/8
• 1
• 7

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

A coin and a number cube with the numbers 1 through 6 are tossed. What is the probability of the coin showing tails and the number cube showing the number 3? 

• 1/12
• 1/4
• 1/8
• 1/2

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.8

Two marbles are randomly drawn from a bag containing 3 purple, 1 blue, and 1 yellow marble. The first marble is blue and is not replaced. Find the probability of drawing a second marble that is purple. 

• 3/5
• 3/4
• 3/20
• 2/5

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8