Answer:
40 questions
Step-by-step explanation:
100-85=15
Missed 15% of questions
If he missed 6 and 15 percent of the questions that means 6=15 percent
15/6
1 question is 2.5 percent
100/2.5=40
Divide 2.5 by 100 because 100 percent is whole
There are 40 questions.
