SOLUTION: Candice has a 76 average in Physics class going into the final, and that final counts for 40% of the course grade. What must she score on the final to get an 80 in the class?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: Candice has a 76 average in Physics class going into the final, and that final counts for 40% of the course grade. What must she score on the final to get an 80 in the class?       Log On


   

Question 1189465: Candice has a 76 average in Physics class going into the final, and that final counts for 40% of the course grade. What must she score on the final to get an 80 in the class?
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
There are several ways to look at it.  Here's one that seems to fit in
with the way people think nowadays:

On a scale of 1 to 10, 

1. the average up to the final, 76, gets a 6, so multiply it by 6.

2. the final exam, X, gets a 4, so multiply it by 4.

3. the course grade desired, 80, gets a 10, so multiply it by 10.

(76)(6) + (4)(X) = (80)(10)

456 + 4X = 800
      4X = 344
       X = 86

Edwin