6 x 100/70...
Eight of them.
7.69%
40
-- Since she answered 86 percent of the questions correctly, she answered the remaining 14 percent of them incorrectly. -- 14% of 100 questions is 14 questions.
No more than 15.But why miss any ?
You can miss 10% of questions, or 12 questions
1400.
Eight of them.
20
To get exactly 90% you need to miss 5.6 questions.
Your score is 73.33%
22 questions
7.69%
35
24 of them.
6 of them.
40