SOLUTION: A student took a test composed of 10 questions, with correct answers worth 5 points. If the student received 30 points for his grade, how many questions were correct? I know the a

Question 684001: A student took a test composed of 10 questions, with correct answers worth 5 points. If the student received 30 points for his grade, how many questions were correct?
I know the answer is 6 but how do I put it in an exquation

Answer by rapaljer(4671) (Show Source): You can put this solution on YOUR website!
For an equation, why don't you set up a ratio:

Let x = number of questions

Now, means that .

means that

Now, solve for x by dividing both sides by 5:

Dr. Robert J. Rapalje, Retired
Seminole State College of Florida

www.mathinlivingcolor.com.

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