Probability Review

In a bag of marbles, 1/3 are red, 1/4 are blue, 1/8 are green, and 1/10 are yellow. You pick a marble without looking. The marble is most likely to be:

• Blue

• Green

• Yellow

• Red

Tags

CCSS.7.SP.C.5

Bryce flipped a penny 8 times. It landed on heads 5 times and tails 3 times. If he flips the coin a 9th time, what statement is true?

• Certain

• Impossible

• Equally Likely or Unlikely

• Unlikely

Tags

CCSS.7.SP.C.5

At this weekend’s football game, 10 out of the first 50 people who enter the field were not wearing hats. If this sample is representative of the 200 people attending the game, about how many of them will probably not be wearing hats?

• 35

• 40

• 100

• 25

Tags

CCSS.7.SP.A.2

Chocolate chip and oatmeal cookies are randomly chosen from a cookie jar and placed onto a platter. The first platter had four chocolate chip cookies and one oatmeal cookie. A second plate was prepared with 2 chocolate chip cookies and X oatmeal cookies. If the probability of drawing a chocolate chip cookie from either plate is 8/25, how many oatmeal cookies, P, are on the second plate?

• 3

• 10

• 25

• 1

Tags

CCSS.HSS.CP.B.7

The six sides of a number cube are labeled 1, 2, 3, 4, 5 and 6. You flip a coin and roll the number cube. What is the theoretical probability that the coin lands on tails and you roll a number greater than 3?

• 1/2

• 3/4

• 1/4

• 1

Tags

CCSS.HSS.CP.B.7

Describe the probability of each given outcome using one of the phrases below:

► Certain, ►Likely, ►Unlikely, ►Neither likely nor unlikely, ►Impossible

A bag contains 12 blue jolly ranchers and 3 red jolly ranchers, and the outcome is drawing a red jolly rancher. Which phrase best describes the probability?

• Unlikely

• Certain

• Impossible

• Likely

Tags

CCSS.7.SP.C.5

Amanda has three different colored pens in her book bag: blue, green and purple. The probability of randomly choosing a blue pen from Amanda’s book bag is 30%. The probability of randomly choosing a green pen from Amanda’s book bag is 0.20.

Explain how likely it is, in relation to 0, for Amanda to randomly choose a purple pen from her book bag.

• Certain

• Unlikely

• Impossible

• Equally Likely or Unlikely

Tags

CCSS.7.SP.C.5

Selena is packing for a five-day trip. Of her shirt colors, two are pink, two are blue, and one is red. Selena does not plan on wearing a t-shirt more than once.

*What is the probability that Selena will not wear a red t-shirt on the first day of her trip?

• 4/5

• 1/5

• 5/5

• 2/5

Tags

CCSS.7.SP.C.7B

What is the probability Stefan will select a golf ball with a “2” written on it and also a golf ball with a D” written on it?

• 11/12

• 3/4

• 1/2

• 1/12

Tags

CCSS.HSS.CP.B.7