Question

What is the value of `x` if `100, 120, 103, 133, 109, x` have a mean of `110`?

Answer 1

`95`

Explanation:

This is a common statistics question.

Set up the equation so that

`(100+120+103+133+109+x)/6=110`

since you have 6 terms with an average of 110

`(100+120+103+133+109+x)/cancel6*cancel6=110*6`

`100+120+103+133+109+x=660`

Now subtract your know values to find `x`:

`x=95`