Question

If 10a+10b=35, what is the average (arithmetic mean) of a and b?

Answer 1

1.75

Explanation:

If a and b are two numbers, then their arithmetic mean is

`(a+b)/(2)`

Given:

`10a+10b=35`

Divide this equation by 10:

`a+b=3.5`

Now, divide it by 2:

`(a+b)/(2)=(3.5)/(2)\\ \\(a+b)/(2)=1.75`