35
6 of them.
You can miss 10% of questions, or 12 questions
18
To get exactly 90% you need to miss 5.6 questions.
.8 x 30 = 24 so you can miss 6 questions
35
24 of them.
6 of them.
40
The answer will depend on how many of the ones you do manage to answer are correct!
You can miss 10% of questions, or 12 questions
No more than 15.But why miss any ?
18
25 questions missed
To get exactly 90% you need to miss 5.6 questions.
No more than 19. You can do it!