12 x 0.7 = 8.4
so missing 1 2 3 is alright
(11 10 9) but 4 or more is not,
as 8 is under 70% and 9 is over 70%.
40
No more than 15.But why miss any ?
25 questions missed
Not more than 11.
you can miss 12 questions 30 right = 30/42 = 71%
You can miss 10% of questions, or 12 questions
.8 x 30 = 24 so you can miss 6 questions
22 questions
35
24 of them.
6 of them.
40
Providing that all the other questions are correct then it is 9 questions
No more than 15.But why miss any ?
25 questions missed
22
No more than 19. You can do it!