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Sum from the mean and count

Find the sum from the mean and count

This math skill teaches how to find the total sum of a number set using the mean and the count of numbers. It involves multiplying the given mean by the count of numbers in the set.

Learn sum from the mean and count

Teaching Transcript

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What is the sum of 3 numbers that have a mean of 9?

Mean is sum divided by count.

So 9 equals sum divided by 3.

We can rearrange to find that the sum is 9 times 3, or 27

Skill Practice

Find the sum from the mean and count

Test your understanding of sum from the mean and count by practicing it! Work through the below exercises to use it in practice.