Question

The average of Johnny's two test grades is a 92 what must he get on his 3rd test to raise his average to a 94?

Answer 1

Johnny would need to get a 98

Explanation:

You would need to use the average formula and see what it would be eual to.

Answer 2

Johnny needs to score 98 on third test to raise average to 94

Explanation:

Given that average of two tests is 92.

The score of next test has to be found that means there will be a total of 3 tests.

The average will be:

`Avg = (test1+test2+test3)/(3)`

It is also given that he has to raise his average to 98

We have to use the average formula for finding the third value

So,

`94 = (92+92+test3)/(3)\\94*3 = 184+test3\\282 = 184+test3\\test3 = 282-184\\test3 = 98`

Hence,

Johnny needs to score 98 on third test to raise average to 94