Well, honey, if you want a 78 percent on a test with 100 questions, you can get 22 questions wrong. That's just simple math, darling. So, make sure you don't mess up more than 22 times, or you'll be singing a different tune.
You can get 60 questions wrong and get a 70 percent but if you get 61 wrong you are at a 69.5 percent.
Each question is worth 2.5 percent. You can get 8 wrong.
5
14 of them.
30
39
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.
Each question is worth 2.5 percent. You can get 8 wrong.
5
14 of them.
30
50
You can get 18 wrong.
69 questions
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.