You can only miss 16 points on a 100 point test in order to get an 84%. If the questions are worth 2 points EACH, you can miss 8. If the questions are worth 4 points each, you can only miss 4 questions.
16
You can miss 10% of questions, or 12 questions
7.5 questions
3 out of 10
To get exactly 90% you need to miss 5.6 questions.
33
You can miss 10% of questions, or 12 questions
you can miss 12 questions 30 right = 30/42 = 71%
1400.
7.5 questions
Eight of them.
3 out of 10
To get exactly 90% you need to miss 5.6 questions.
33
20
Four questions.
I think it depends on the grading scale. However, if each was worth a point then maybe you could only miss 15 questions to get an 85%.
0.70 x 125 = 88 questions right You can miss 125-88 = 37 questions to get 70 percent But you got to get all the rest correct!