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Example Questions
Example Question #11 : Proportion / Ratio / Rate
Jeff went to a bookstore where science books cost $10.00 each and comic books cost $5.50 each. If Jeff bought twice as many comic books as science books, and spent a total of $42.00, how many comic books did he buy?
Possible Answers:
3
2
5
4
10
Correct answer:
4
Explanation:
Assign a variable to science books since everything in the question can be written in terms of science books.
Write an expression for the phrase "twice as many comic books as science books."
To create an equation for the cost of the books, we can write the following:
Substitute in the known values and variables.
Jeff purchased 2 science books and 4 comic books.
Andrew
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