Common Core: 7th Grade Math : Develop a Uniform Probability Model by Assigning Equal Probability to all Outcomes: CCSS.Math.Content.7.SP.C.7a

Study concepts, example questions & explanations for Common Core: 7th Grade Math

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Example Questions

Example Question #11 : Develop A Uniform Probability Model By Assigning Equal Probability To All Outcomes: Ccss.Math.Content.7.Sp.C.7a

Samantha has a bag of marbles containing  pink marbles,  orange marble,  red marbles,  purple marbles,  white marbles,  black marble,  green marbles, and  yellow marble. What is the probability that Samantha will pick a green marble out of the bag?

 

Possible Answers:

Correct answer:

Explanation:

In this problem we have a total of  marbles. That means that each marble, regardless of color, has a  chance of being picked, as shown in the images below. This image shows equal probability because each marble has a  chance of being drawn, which is equal to the probability of all of the other marbles.

1

Samantha wants to know what her probability is of drawing a green marble out of her bag. Remember, probability is the number of favorable outcomes over the total number of outcomes:

For this problem there are  green marbles; therefore, 

Example Question #146 : Statistics & Probability

Samantha has a bag of marbles containing  pink marbles,  orange marble,  red marbles,  purple marbles,  white marbles,  black marble,  green marbles, and  yellow marble. What is the probability that Samantha will pick a yellow marble out of the bag?

 

Possible Answers:

Correct answer:

Explanation:

In this problem we have a total of  marbles. That means that each marble, regardless of color, has a  chance of being picked, as shown in the images below. This image shows equal probability because each marble has a  chance of being drawn, which is equal to the probability of all of the other marbles.

1

Samantha wants to know what her probability is of drawing a yellow marble out of her bag. Remember, probability is the number of favorable outcomes over the total number of outcomes:

For this problem there is  yellow marble; therefore, 

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