Question

You have a test with 80 questions but you need a 90% to get a good grade for the class. How many questions do you need to get right?

Answer 1

72 questions

Explanations:

Given the following parameter

Total questions in the test = 80 question

If the student need to get 90% to get a good grade, the number of questions he needs to get right is expressed as:

`\begin{gathered} number\text{ of questions}=90\%\text{ }of\text{ 80} \\ number\text{ of questions}=0.9*80 \\ number\text{ of questions}=72questions \end{gathered}`

Hence the number of question that you need to get right is 72 questions