SOLUTION: A student has an average of 72 on four exams. If the final exam is to count double, what score does she need to have an averge of 80?
Algebra.Com
Question 453970: A student has an average of 72 on four exams. If the final exam is to count double, what score does she need to have an averge of 80?
Found 2 solutions by richwmiller, solver91311:
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
(4*72+2x)/6=80
x=96
at least a score of 96
another way
72 misses 80 by 8
4*8=32
32/2=16
16+80=96
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
If his current average is 72 for 4 exams, then his total points have to be 4 times 72.
If his final average for 4 exams plus a final that counts for 2 exams must be 80, then his final point total must be 6 times 80.
Subtract his current point total from his needed final total giving you the points he needs to achieve. Since the final counts as 2, this number will be 2 times the score he needs on the final.
John
My calculator said it, I believe it, that settles it
RELATED QUESTIONS
Going into the final exam, which will count as two tests, Brooke has test scores of 75,... (answered by Boreal)
A course at a local college has four exams. The first three each count for 20% of the... (answered by edjones)
Going into the final exam, which will count as 2 tests, Brooke has a test score of 80,... (answered by Edwin McCravy,josmiceli)
A student has an 83 average. Her final exam will count as 1/3 of her grade. What does... (answered by Edwin McCravy)
A student has scores of 75, 79, and 81 on three government exams. What score does she... (answered by jim_thompson5910)
A student’s average is determined by 4 exam grades and a final that is worth twice as... (answered by stanbon)
manuel has scores of 77 82 89 89 and 92 on 5 class exams. his final exam is going to... (answered by bucky)
The final exam will count as two tests, brooke has test scores of 83,80,71,61,and 95.... (answered by htmentor)
Going into the final exam, which will count as two tests, Ameilia has test scores of... (answered by ankor@dixie-net.com)
