Probs & Stats - Unit 1 Review

Find the sample space.

• 6

• 3

• 12

• 1

Find the theoretical probability of rolling an odd number on a die.

• 3/6 = 1/2 = 0.5 = 50%

• 2/6 = 1/3 = 0.33 = 33%

• 1/6 = 0.166 = 16.6%

• 4/6 = 2/3 = 0.66 = 66%

Tags

CCSS.7.SP.C.7A

Find the theoretical probability of choosing a heart card from a deck of cards.

• 13/52 = 1/4 = 0.25 = 25%

• 1/2 = 0.5 = 50%

• 1/13 ≈ 0.077 ≈ 7.7%

• 1/52 ≈ 0.019 ≈ 1.9%

Tags

CCSS.7.SP.C.7B

Choose a day that starts with an S in the days of the week.

• 2/7 ≈ 0.286 ≈ 28.6%

• 1/7 ≈ 0.143 ≈ 14.3%

• 3/7 ≈ 0.429 ≈ 42.9%

• 4/7 ≈ 0.571 ≈ 57.1%

Find the theoretical probability of rolling a sum of 6 when rolling 2 dice.

• 3/36 = 1/12 ≈ 0.08 = 8%

• 5/36 ≈ 0.14 = 14%

• 1/18 ≈ 0.055 = 5.5%

• 7/36 ≈ 0.19 = 19%

Tags

CCSS.7.SP.C.7B

A jar contains 1 red and 1 blue marble. Four students are chosen to pick a marble each day. They win a prize if they get the red marble. What is the probability that at least 2 students win a prize?

• 11/16 = 0.6875 = 68.75%

• 1/2 = 0.5 = 50%

• 3/8 = 0.375 = 37.5%

• 1/4 = 0.25 = 25%

What is the probability of getting dots on the spinner?

• 12/30 = 2/5 = 0.4 or 40%

• 8/30 = 4/15 ≈ 0.267 or 26.7%

• 15/30 = 1/2 = 0.5 or 50%

• 6/30 = 1/5 = 0.2 or 20%

Tags

CCSS.7.SP.C.6

What is the probability of getting stripes on the spinner?

• 6/30 = 1/5 = 0.2 or 20%

• 3/30 = 1/10 = 0.1 or 10%

• 12/30 = 2/5 = 0.4 or 40%

• 9/30 = 3/10 = 0.3 or 30%

Tags

CCSS.7.SP.C.7B

What is the probability of getting black on the spinner?

• 10/30 = 1/3 ≈ 0.33 or 33.3%

• 5/30 = 1/6 ≈ 0.17 or 16.7%

• 15/30 = 1/2 = 0.5 or 50%

• 8/30 ≈ 0.27 or 27%

Tags

CCSS.7.SP.C.7B

Ms. Dazalla's coin purse has 30 coins. There are 14 pennies, 3 quarters, 4 dimes, and the remainder are nickels. What is the theoretical probability of randomly selecting a nickel out of Ms. Dazalla's coin purse?

Tags

CCSS.7.SP.C.7B