Question

The mean of 7 numbers is 15. What is their sum?​

Answer 1

The sum of 7 numbers = 105

Given :

The mean of 7 numbers is 15

To find :

The sum of 7 numbers

Solution :

Step 1 of 2 :

Write down mean of 7 numbers

Here it is given that the mean of 7 numbers is 15

Step 2 of 2 :

Calculate sum of 7 numbers

Number of terms = 7

Mean of 7 numbers = 15

Hence the required sum of 7 numbers

= Mean × Number of terms

= 15 × 7

= 105

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Answer 2

Given:

The mean of seven numbers is fifteen.

To find:

We have to find the sum of the seven numbers.

Solution:

The mean or average of numbers is the sum of the given numbers divided by the total count of the numbers.

The average is also known as arithmetic mean or mean.

The formula for mean is,

Arithmetic mean ( average ) = $\frac{Sum of the numbers }{Total count of numbers}$

 

Since the mean of seen numbers is equal to 15.

The total count of numbers = 7

Putting the values in the formula, we get,

Mean of seven numbers = (Sum of seven numbers)/ Total count of the numbers

15 = (Sum of seven numbers) / 7

Therefore,

Sum of seven numbers = 15 × 7

= 105

Hence, The sum of seven numbers is equal to 105.