Common Core: 6th Grade Math : Find mean

Example Questions

Example Question #1 : Data Analysis

In a group of 4 books, the average number of pages is is 10.  Juan adds a book with 20 pages to the group.  What is the new average number of pages?

Explanation:

If the average of 4 books was 10, then the total number of pages was . Adding in the 20 new pages, but now dividing by 5 you get .

Example Question #1 : Data Analysis

Give the mean of the data set (nearest tenth, if applicable):

Explanation:

Add the six elements and divide the sum by 6:

Example Question #1 : Data Analysis

Find the mean of this set of numbers:

54, 41, 99, 120, 66.

Explanation:

Then, divide by the amount of numbers in the set:

Example Question #1 : Data Analysis

Give the mean of the following eight scores:

Explanation:

Divide the sum of the scores by eight:

Example Question #1 : How To Find Mean

Give the mean of the following nine scores:

Explanation:

Divide the sum of the scores by nine:

Example Question #1 : Find Mean

The average age of 4 people is 12.  What will be the sum of their ages in 3 years?

Explanation:

The current sum of their ages is .  Since all 4 people will gain 3 years in age, we have to add 12 to the current sum.

Example Question #1 : Find Mean

Give the mean of the following data set:

Explanation:

Since there are 16 elements, divide their sum by 16 to get the mean:

Example Question #1 : Find Mean

Find the average of this set of numbers:

521, 834, 754, 902, 899

Explanation:

First, add all the numbers in this set:

Divide, 3910 by the total amount of numbers in the set:

Example Question #11 : How To Find Mean

Find the mean in this set of numbers:

5570, 4886, 5226, 4120, 6561, 4120, 6008

Explanation:

First, add all the numbers in this set:

Then, divide that amount by the total number in the set:

Example Question #41 : Data Analysis

Find the average of this set of numbers:

2521, 2512, 2525, 2552, 2551, 2525, 2517