Probability Review

Which of the following is not a possible probability of an event occurring?

• 27.18181818...%

• 3/19

• 0.8

• 1.3

Dave is going to roll a 6-sided number cube and toss a penny. What is the likelihood that the number cube will land on 5 and the penny will be heads?

• Likely

• Unlikely

• Neither likely nor unlikely

• Impossible

Joy uses a special polyhedron for some experiments. There is a 1/5 probability that Joy will roll a number that is a multiple of 4. There is a 7/15 probability that Joy will roll a number that is a factor of 24. Joy rolls the polyhedron two times. What is the probability that Joy rolls a multiple of 4 on her first roll and a number that is not a factor of 24 on her second roll?

• 7/75

• 1/11

• 11/15

• 8/75

A box contains 50 red paper clips, 20 blue paper clips, and 80 green paper clips.
Margo randomly selects 1 paper clip from the box, records its color, and returns it to the box. She does this 10 times.
Which choice shows experimental results from Margo’s selections that are closest to the expected results when based on the probabilities of selecting a paper clip of each color from the box?

• Red: 3   Blue: 2   Green: 5

• Red: 5   Blue: 1  Green: 4

• Red: 4   Blue: 3   Green: 3

• Red: 2   Blue: 1   Green: 7

A spinner is divided into 5 equal sections, some yellow, some orange, and some blue. Shawna spun the spinner many times. She got yellow 50 times, orange 45 times, and blue 25 times. 
Based on these results, how many of the 5 equal sections are most likely each color?        

• Yellow: 2   Orange: 2   Blue: 1

• Yellow: 3   Orange: 1   Blue: 1

• Yellow: 2   Orange: 1   Blue: 2

• Yellow: 1   Orange: 3   Blue: 1

A bag has 3 red marbles, 2 blue and 4 yellow. What is the theoretical probability of pulling a red?

• 3/10

• 3/9

• 1/9

• 1/3

The outcome of one event does not influence the outcome of the other event

• independent event

• tree diagram

• simple event

• odds

If you choose from the following M & M colors, what is the probability that you choose blue?
5 green
6 yellow
8 blue
7 brown

• 8/26

• 4/13

• 8/25

• 1/3

If 33% of the students at Harnett Central have a pet, then what is the probability of the complement of this event?

• 33%

• 77%

• 67%

• 50%

The letters that form the word ALGEBRA are placed in a bowl. What is the probability of choosing a letter other than “A”? 

• 2/7

• 5/49

• 5/7

• 10/49