Question

I WILL GIVE BRAINILY (20 PTS)

There are 15 questions, and John got an 84% on the quiz, how many questions did John get right and how many wrong?

Answer 1

`(n)/(15) =(84)/(100)`

`n = (21)/(25)*5`

`n = (21*15)/(25)`

`n = (315)/(25)`

`n = (63)/(5) or 12.6`

Answer 2

John got 13 questions right and 2 questions wrong.

Explanation:

15 questions right equals 100%.

100 {divided by} 15 = % for each question right

Each question is worth (100 diveded by 15) 6.7%.

84% {diveded by} 6.7% = 12.5

100% - 84% = 16%

16% {divided by} 6.7% = 2.38

Because 12.5 has a higher dicimle value than 2.38 and when the amount he got right is added to the amount he got wrong it needs to equal 15, 12.5 becomes 13 and 2.38 becomes 2.