7th Grade Probability Review

Billy and Tommy are playing a dice game with six-sided die. Billy needs to roll a 5 or higher to win the game. What is the probability that Billy will roll a 5 or higher?

Tags

CCSS.7.SP.C.7B

A bag contains 3 purple marbles, 4 yellow marbles, and 5 green marbles. Erica draws a marble, replaces it, and draws another marble. She draws a marble 60 times. How many times can she expect to draw each color marble?

For each statement, drag it to either the True or False Column.

Groups:

(a) True

,

(b) False

• Erica can expect to draw a purple marble 20 times.
• Erica can expect to draw a yellow marble 15 times.
• Erica can expect to draw a green marble 25 times.

Tags

CCSS.7.SP.C.6

During a festival game, children attempt to wind a prize by drawing a token from a bag. The tokens are labeled Large Prize, Small Prize, or No Prize. After a token is drawn, it is returned to the bag. The table on the left shows the three types of tokens and the number of each token in the bag.

Lia observes the game and keeps track of 20 consecutive draws from the bag. She records her results in the table shown on the right.

Which statements about the game are true? Drag each statement to the True or False category.

Groups:

(a) True

,

(b) False

• The theoretical probability of winning a large prize is 0.125.
• The theoretical probability of winning a small prize is 0.10.
• Based on the theoretical probability, it is more likely to win a small prize than a large prize.
• The observed probability model matches the theoretical probability model.
• From Lia's observed frequencies, the probability of getting no prize is 0.65.
• From Lia's observed frequencies, the probability of winning a large or small prize is 0.7.

The spinner shown is being used in a game. What is the probability of spinning the arrow once with the result being an even number less than 6?

Mathematical Equivalence

ON

Tags

CCSS.7.SP.C.7B

A spinner is shown.

Put each outcome in order of the likelihood of their occurrences from Likely (1) to Not Likely (4).

• Spinning a letter

• Spinning the letter W

• Spinning a number

• Spinning the number 2

Tags

CCSS.7.SP.C.5

A group of 4 friends played a certain board game 40 times. The table shows how many times each player won.

According to these results, what is the probability that any given game is won by Lisa?

Tags

CCSS.7.SP.C.6

There are 500 students in a school. Sara asked 100 of the students what their favorite lunch is. Out of the students surveyed 45 said pizza, 15 said burritos, 30 said hamburgers, and 10 said hot dogs. Based upon the results, how many students out of the whole school should want the items listed?

• Pizza: 45

  Burritos: 15

  Hamburgers: 30

  Hot Dogs: 10

• Pizza: 22,500

  Burritos: 7,500

  Hamburgers: 15,000

  Hot Dogs: 5,000

• Pizza: 125

  Burritos: 125

  Hamburgers: 125

  Hot Dogs: 125

• Pizza: 225

  Burritos: 75

  Hamburgers: 150

  Hot Dogs: 50

Tags

CCSS.4.OA.C.5

Claire, Madeline, and James each write the letters of their names on pieces of paper, with one letter on each piece. All of the pieces of paper are put into a bag, and they draw one out. The first letter they draw is an "e", and they put it aside. What is the probability that the next letter they draw is a letter found only in Claire's name?

• 0

There are 32 students in Jenny's class. Each day her teacher chooses a student at random to try a problem of the day. What is the probability that Jenny will be chosen twice in a row?

• 0.32

• 0.0313

• 0.0098

• 0.0010

The weather forecast shows the likelihood of rain for the next seven days.

Read the following statements about the probabilities for the chance of rain. Use the drop-down menus to choose the response that makes each statement true.

It is ​ (a)   to rain on Monday.

It is ​ (b)   to rain on Thursday.

It is ​ (c)   to rain on Friday than it is to rain on Sunday.

• unlikely
• neither unlikely nor likely
• less likely
• likely
• more likely

Tags

CCSS.7.SP.C.5