Question

The average of 63 and one other number is 33. What's the other number?

Answer 1

3

Explanation:

The average of two numbers is the sum of the two numbers, divided by 2. Like this:

`(x_1+x_2)/2=avg`

We are given `x_1, avg` and are asked to find `x_2`:

`(63+x_2)/2=33`

`(63+x_2)=66`

`x_2=3`