Question

Here are three numbers 5 7 9 show that the mean of the 3 numbers is 7

Answer 1

Explanation:

given, the numbers are 5,7,9.

now , N=3 and sum of x= 21

by formula,

mean = sum of x/N

or , mean = 21/3

=7....is answer

hope its helpful..

Answer 2

see explanation

Explanation:

The mean is calculated as

mean =
`(sum)/(count)` =
`(5+7+9)/(3)` =
`(21)/(3)` = 7