A student answers 90% of the questions on a math exam correctly. If he answers 18 questions correctly, how many questions are on the exam?

asked Jan 22, 2019 132k views

4 votes

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2 votes

There are 20 questions.

Bill Criswell answered Jan 25, 2019

6.0k points

5 votes

x=total questions on quiz

90/100=18/x

1800=90x

x=20

There were 20 questions on the quiz.

Ckramer answered Jan 28, 2019

6.3k points

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