Probability Test Study Guide

There are twenty-four students who want to be on the morning announcements. If three students can be selected, how many different combinations of students can be on the morning announcements?

• 12,144

• 12,824

• 72

• 6,324

Shamar is on the football team. He has a 75% pass completion rate. He may complete his next pass. Which of these methods could be used to simulate this situation?

• Flip a coin once. Let heads represent a completion and let tails represent an incomplete pass.

• Use a random number generator. Let 1 represent a completion and 2 represent an incomplete pass.

• Spin a spinner with 4 equally-sized sections. Let 3 sections represent a complete pass and let 1 section represent an incomplete pass.

• Draw a marble from a bag that contains 8 red and 8 blue marbles. Let a red marble represent a complete pass and a blue marble represent an incomplete pass.

Tags

CCSS.7.SP.C.8C

In one hour yesterday, 2 out of every 5 meals sold was a kid's meal. Based on the findings, how many kid's meals can we expect to sell if 860 meals are sold?

• 430

• 344

• 0.4

• 172

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

Laura hits 20% of the stoplights on the way to work. She wants to design a simulation using a spinner to predict the number of stoplights she will hit out of the next 50. Which simulation design has an appropriate device and correct trial?

• Divide a spinner into 5 equal sections labeled 1, 2, 3, 4 and 5. Spin the spinner 10 times.

• Divide a spinner into 5 equal sections labeled 1, 2, 3, 4 and 5. Spin the spinner 50 times.

• Divide a spinner into 4 equal sections labeled 1, 2, 3 and 4. Spin the spinner 50 times.

• Divide a spinner into 4 equal sections labeled 1, 2, 3 and 4. Spin the spinner 10 times.

Tags

CCSS.7.SP.C.8C

A spinner has five spaces labeled 1-5. The spinner was spun 20 times. The results wer: 3-4-5-4-4-3-2-2-4-5-1-3-3-2-5-5-3-3-2-4 (According to this, what is the experimental probability that the spinner will land on 2?

• 1/4

• 3/20

• 1/5

• 15/20

Tags

CCSS.7.SP.C.6

True or False: A probability can be expressed as a decimal, percent and/or a simplified fraction?

• TRUE

• FALSE

Tags

CCSS.7.SP.C.5

Ella is playing a game at a carnival. She must hit balloons with a dart. There are 40 balloons on the wall. 15 are blue, 10 are white, 10 are green, and 5 are yellow.

What is the probability that Ella will hit a blue balloon OR a yellow balloon?

• 0.50

• 20/40

• 5/104

• 25%

Tags

CCSS.HSS.CP.B.7

A spinner is divided into 8 equal sections, numbered 1-8. If the spinner is spun twice, what is the probability that it will land on a 3 and then on a number greater than 6?

• 3/16

• 2/64

• 1/32

• 3/8

Julie has 10 blue pencils and 6 red pencils in her pencil case. What is the probability you choose a blue, return it and then choose a red? Express the probability as a percent.

• 23%

• 25%

• 27%

• 20%

Julie has 10 blue pencils and 6 red pencils. She randomly chooses THREE pencils WITHOUT replacement. What is the probability that she chooses two blue pencils in a row, followed by a red pencil? (Three fractions multiplied!)

• 540/3360

• 75/512

• 9/56

• 300/2048