Question

Given a set `{11, x ,-44, 1}`, for what x would the mean be 4?

Answer 1

`x=4`

Explanation:

The mean (or average) of a set is defined as

`bar x= 1/nsum_(I=1)^nx_i`

So substituting in this case we get

`4=1/4(11+x-44+1)`

Now solving for x yields `x=(4xx4)+32=48`