Probability Review: Level 3

What is the probability that a customer will bring less than 5 items to the express lane?

• 0.11

• 0.31

• 0.44

• 0.75

You roll a 12-sided die and flip a coin. What's the probability you roll a number greater than or equal to 8 then flip tails?

• 5/24

• 1/3

• 1/24

• 5/12

A bag contains 2 blue marbles, 3 black marbles, and 5 red marbles. Mrs. Grow picks one marble, replaces it, then picks another. What is the probability of them both being blue?
P(blue and blue) 

• 1/25
• 1/5
• 1/20
• 2/5

Tags

CCSS.7.SP.C.8

CCSS.7.SP.C.5

CCSS.7.SP.C.7

Samuel has 5 different colors of pens and 2 different colors of paper. Which model could be used to simulate how many different combinations he has?

• spin a 5-sided spinner, then flip a coin
• roll a die 5 times
• flip a coin 5 times
• spin a 7-sided spinner twice

Tags

CCSS.7.SP.C.8C

The door of Mr. Smith's garage has 400 square feet of surface area. Twenty-five square feet of the door is glass. During a neighborhood baseball game, a ball is thrown wildly and hits the garage door. What is the probability that the ball hit a window?

• 6%

• 16%

• 25%

• 9%

Tags

CCSS.7.SP.C.7B

The sample space for a team of three students is shown.  What is the probability that the team would consist of at least 2 girls?

• ½
• ⅜
• ¾
• ⅙

Tags

CCSS.7.SP.C.8B

How could you simulate randomly choosing a shirt to wear out of 8 different choices?

• flip three coins
• roll a die
• spin a 5-sided spinner and flip a coin
• roll two dice

Tags

CCSS.7.SP.C.8

The sample space for rolling two dice is shown.  What's the probability of the pair rolling at least one 4?

• 5/36
• 1/6
• 11/36
• 1/36

Tags

CCSS.7.SP.C.8B

The questions on a multiple choice test each have 5 answer choices. Which model can be used to simulate randomly selecting the correct answer on a 20 question multiple choice test?

• rolling a number cube 5 times
• spinning a five-sided spinner 20 times
• flipping a coin 20 times
• choosing 1 marble in a bag of 20 different colored marbles

Three coins are tossed.  What's the probability of flipping only one tails?

• ⅛
• ⅜
• ⅓
• ⅞

Tags

CCSS.7.SP.C.8B