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.
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 20 questions wrong.
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.
In order to score 80% on a test with 30 questions, you must give 6 wrong answers. You can do it!
14.
30
14 of them.
5