Question

Mark had 14 problems wrong on his test. his score was 72% correct. how many problems were on the test?

Answer 1

50 problems

Thanks for using my answer!!

Answer 2

Let x = number of problems on test
If he got 14 wrong, then x - 14 is the number correct.

`(x-14)/(x) = .72`
x - 14 = .72x
.28x - 14 = 0
.28x = 14
x = 50

The test consisted of 50 problems.