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A student earned a grade of 80% on a math test. He answered 20 of the questions correctly. How many problems were on the test?

User Blaneyneil
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1 Answer

6 votes

Answer: 25

Explanation:

Given

The student earned 80% on a math test

The student answered 20 questions

Suppose x is the total no of questions

So, we can write


\Rightarrow (20)/(x)* 100=80\%\\\Rightarrow (20)/(x)=0.8\\\\\Rightarrow (20)/(0.8)=x\\\\\Rightarrow x=25

So, there are 25 questions in total

User Zulaxia
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