SOLUTION: Test 1 is worth 55% Test 2 is worth 35% Participation is worth 10% I received 85% on test 1. What do I need to get on test 2 in order to bring the overall % to above 90 Tha

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: Test 1 is worth 55% Test 2 is worth 35% Participation is worth 10% I received 85% on test 1. What do I need to get on test 2 in order to bring the overall % to above 90 Tha      Log On


   

Question 894073: Test 1 is worth 55%
Test 2 is worth 35%
Participation is worth 10%
I received 85% on test 1. What do I need to get on test 2 in order to bring the overall % to above 90
Thank you
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
%2855%2A%280.85%29%2B35%28n%29%29=90, which shows no contribution from participation.
The unit for left and right members is percent of course.
Test 1 and test 2 scores are in decimal fraction form, not as percents.

35n=90-55%280.85%29
n=%2890-55%280.85%29%29%2F35
n=.... this will not work.

Best to allow for full "participation".
55%280.85%29%2B10%2B35%2An=90
n=%2890-10-55%280.85%29%29%2F35
n=0.95
This means test 2 score needs to be 95%, and this is with full score part in participation.