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Count from mean and sum

Find the count from mean and sum

This math skill teaches how to determine the number of values in a set by using the total sum of the numbers and the mean. The formula used is the count equals the sum divided by the mean.

Learn count from mean and sum

Teaching Transcript

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If a set of numbers adds to 24 and has a mean of 6, how many numbers are there?

Mean is sum divided by count.

Plugging in our values, we see that 6 equals 24 divided by count.

Rearranging, that means that count is 24 divided by 6

So our count is 4

Skill Practice

Find the count from mean and sum

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