11
69 questions
20
22 questions can be wrong. This means that you would have to get 33 marks, which is 60%
7 wrong out of 22 questions = 31.8% wrong. 15 correct out of 22 questions = 68.2% correct. I hope it wasn't a math test.
10 can be wrong and 30 right; 30/40 = 75%
69 questions
Nine.
39
40% were wrong.
45.4545.. % wrong.
20
22 questions can be wrong. This means that you would have to get 33 marks, which is 60%
7 wrong out of 22 questions = 31.8% wrong. 15 correct out of 22 questions = 68.2% correct. I hope it wasn't a math test.
10 can be wrong and 30 right; 30/40 = 75%
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 up to 150 questions wrong.
30/100*25 =7.5 so you must not get more than 7 questions wrong to score 70%