Question 1052398: The average of Johnny's two tests is a 92. What must he get on a 3rd
test to raise his average to a 94?
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! average=total/number
92=total/2
total=184
For the third test, n=3, average must be 94, and 3*94 is 282. His current total is 184, so he needs a 98.
-------------------
Way 2
each test is two points below the desired average or 4 points total.
The third test must be four points above the average or 98.
|
|
|
