Concepts in Statistics Practice

George rolls a ten-sided die, numbered from 1 to 10, and wants to find the probability of rolling an 8. Match each part of the given situation listed on the left to its related probability term listed on the right.

• event

• a number from 1 to 10

• trial

• rolling an 8

• outcomes

• rolling a ten-sided die

Tags

CCSS.7.SP.C.7A

Dezi flips a coin that can come up either heads or tails twice. She wants to find the probability of flipping two tails. Match each part of the given situation listed on the left to its related probability term listed on the right.

• flipping two tails

• event

• HH, TT, HT, or TH

• trial

• flipping a coin twice

• outcomes

Edward has a bag of snack mix that contains 6 cereal pieces, 5 peanuts, 2 pretzels, and 2 bagel chips. Suppose that he is equally likely to pick any individual object from the bag. What is the probability that Edward will randomly pull a pretzel from the bag?

• 2/15

• 4/15

• 1/4

• 1/2

Tags

CCSS.7.SP.C.7B

Kevin has a bag with five red marbles, three blue marbles, and seven green marbles. Suppose that Kevin is equally likely to pick any individual marble from the bag. What is the probability that he will randomly pull a red marble from the bag?

• 1/3

• 1/5

• 7/15

• 2/3

Tags

CCSS.7.SP.C.7B

A spinner is divided into equal parts as shown below (with blue, yellow, green, and red sections). Find the probability of spinning blue or yellow on this spinner.

• 2/4 or 1/2

• 1/4

• 3/4

• 1/3

Tags

CCSS.HSS.CP.B.7

Buzz and Woody play the following game: A bag has 20 tiles in it, numbered 1 to 20. Buzz and Woody take turns drawing a tile, recording the number, and placing the tile back in the bag. Buzz earns a point if he draws a factor of 15. Woody earns a point if he draws a multiple of 5. Which statement best explains whether or not the game is fair?

• The game is fair because Buzz and Woody have the same probability of drawing a winning number.

• The game is not fair because the probability of Buzz drawing a winning number is greater than the probability of Woody drawing a winning number.

• The game is not fair because the probability of Woody drawing a winning number is greater than the probability of Buzz drawing a winning number.

• The game is fair because both Buzz and Woody will get a point if the number 20 is drawn.

Tags

CCSS.HSS.MD.B.6

CCSS.HSS.MD.B.7

Fiona makes handmade scarves to sell online. Customers have the following options when choosing a custom scarf:

• silk or cotton fabric

• beading or fringe

• short, medium, or long.

Fiona sends a random scarf along with each purchased scarf as a bonus to her customers. What is the probability that the bonus scarf will be a made of cotton?

• 1/3

• 1/2

• 1/6

• 2/3

Jerry has two six-sided dice, one red and one green, numbered 1 to 6. What is the probability that he will roll a sum of 5?

• 1/6

• 1/9

• 5/36

• 1/3

Seth rolls a pair of six-sided dice, one white and one purple, each numbered 1 to 6, and flips a coin. What is the probability that he rolls sum of 7 and gets tails?

• 1/12

• 1/6

• 1/18

• 1/36

What is the probability that Tiff flips exactly two tails when flipping two coins and rolls a number less than 5 on a six-sided die numbered 1 to 6?

• 1/12

• 1/6

• 1/8

• 1/4