Unit 1 Probability Review

In a bag of marbles, 1/2 are red, 1/4 are blue, 1/12 are green, and 1/6 are yellow. You pick a marble without looking. What color marble are you most likely to not choose?

• blue

• red

• yellow

• green

Tags

CCSS.7.SP.C.5

Bruce flipped a penny 5 times. It landed on heads 2 times and tails 3 times. If he flips the coin a 6^th time, which of the following statements is TRUE?

• It is unlikely he will get tails

• It is unlikely he will get heads

• certain he will get heads

• as likely as not to be heads or tails

Tags

CCSS.7.SP.C.5

At this weekend’s music festival, 10 out of the first 50 people who entered the field were not wearing hats. If this sample is representative of the 300 people attending the game, about how many of them will probably NOT be wearing hats?

• 60

• 50

• 30

• 100

Tags

CCSS.7.SP.A.2

A bag contains 20 jaw breakers and 2 pieces of gum, and the outcome is drawing a piece of gum. Which phrase BEST describes the probability?

• certain to draw out a piece of gum

• likely to draw out a piece of gum

• impossible to draw out a piece of gum

• unlikely to draw out a piece of gum

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 0.10.

How likely is it, in relation to 0, for Amanda to randomly choose a purple pen from her book bag?

• 50%

• 40%

• 60%

• 70%

Tags

CCSS.7.SP.C.7A

Steven has one bag that contains three table-tennis balls numbered 1, 2, and 3. He also has a second bag that contains four table-tennis balls lettered A, B, C, and D.

How many outcomes would be possible? (Sample Space.)

• 10

• 12

• 14

• 16

Steven has one bag that contains three table-tennis balls numbered 1, 2, and 3. He also has a second bag that contains four table-tennis balls lettered A, B, C, and D.

What is the probability Steven will select a table-tennis ball with a “1” written on it and also a table-tennis ball with a “B” written on it? Explain your answer or show your work.

• 1/6

• 2/12

• 1/12

• 1/2

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

What is the probability that Tina WILL wear a white t-shirt on the first day?

• 2/5

• 1/5

• 3/5

• 4/5

Tags

CCSS.7.SP.C.7B

If an event has a probability of "1" , this means that the event will happen .............

• Only 1 tme

• 1% of the time

• 100% of the time

• never

Tags

CCSS.7.SP.C.5

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 heads and you roll a number greater than 3?

• 1/12

• 1/4

• 6/12

• 4/12

Tags

CCSS.HSS.CP.B.7