30/100*25 =7.5
so you must not get more than 7 questions wrong to score 70%
In order to score exactly 70% on a test with exactly 70 questions ... if every questionis worth the same credit ... you have to get 21answers wrong. You can do it.
If you get 7 wrong you'll get 23/30 = 76.66... % Not enough. So fewer than 7. But that is provided that wrong answers score 0 and do not have penalties.
You can get 60 questions wrong and get a 70 percent but if you get 61 wrong you are at a 69.5 percent.
.30 x 170 = 51 wrong
Each question is worth 2.5 percent. You can get 8 wrong.
39
In order to score exactly 70% on a test with exactly 70 questions ... if every questionis worth the same credit ... you have to get 21answers wrong. You can do it.
You can get 20 questions wrong.
If you get 7 wrong you'll get 23/30 = 76.66... % Not enough. So fewer than 7. But that is provided that wrong answers score 0 and do not have penalties.
You can get 60 questions wrong and get a 70 percent but if you get 61 wrong you are at a 69.5 percent.
.30 x 170 = 51 wrong
Each question is worth 2.5 percent. You can get 8 wrong.
14.
In order to score 80% on a test with 30 questions, you must give 6 wrong answers. You can do it!
30
14 of them.
5