2007-04-16 15:04:10 · 11 answers · asked by njank99 4 in Science & Mathematics ➔ Mathematics
set up a proportion
okay 80% is nothing but 8/10.
8/10=x/75
cross multiply
600=10x
x=60
now subtract
75-60=15
he can get a max of 15 wrong
2007-04-16 15:11:05 · answer #1 · answered by Anonymous · 1⤊ 1⤋
I think its 15. Just set up a proportion: 80/100=?/75. The answer for the missing number is 60, so 80% of 75 would be 60, so you need to get at least 60 questions to pass.
The answer is then 15
2007-04-16 22:10:17 · answer #2 · answered by KosmicQueen 2 · 1⤊ 1⤋
75 x .20 = 15
2007-04-16 22:06:44 · answer #3 · answered by kelsey 7 · 0⤊ 1⤋
75*0,80=60 questions
75-60=15
15/75=1/5=%20
%20 OR LESS
2007-04-16 22:11:27 · answer #4 · answered by iyiogrenci 6 · 0⤊ 1⤋
x/75 >= 80%
x/75 = 80/100
x = 80*75/100
x = 6000/100
x = 60
60/75 = PASS
59/75 = FAIL
A student can miss 15 questions and still pass.
2007-04-16 22:11:23 · answer #5 · answered by Brian F 4 · 0⤊ 1⤋
20% wrong answers = .20
.20 x 75 = 15
2007-04-16 22:10:32 · answer #6 · answered by Stratman 4 · 1⤊ 1⤋
They must answer 64 questions correctly or 11 wrong. That would give them 85.3%.
If they answer 63 correctly, they get 84%
2007-04-16 22:14:25 · answer #7 · answered by Anonymous · 0⤊ 1⤋
15
to find out this answer
75 divided by 100 = .75
.75 multiplied by 20 =15
2007-04-16 22:14:35 · answer #8 · answered by webb1socoolguy 3 · 1⤊ 1⤋
75(.8)=60
2007-04-16 22:09:40 · answer #9 · answered by dwinbaycity 5 · 0⤊ 3⤋
60 questions.
2007-04-16 22:12:17 · answer #10 · answered by Caseyy.♥♥ 5 · 0⤊ 1⤋