Question

Wade has a test score of 77% on his first yes and 65% on his second test. What must he score on a third to have an average of 80% overall

Answer 1

Answer: Wade needs to score 98%

Step-by-step explanation:

Lets say that the score that he got on the third test is x

the average will be found using an equation that goes like this

$\frac{77+65+x}{3}$ ×100 = 80

now we shift every constant value to the RHS  

x = 80×3-77-65

ie: x = 98%