SAT Math Multiple Choice Practice Question 101: Answer and Explanation

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Question: 101

13. Which expression represents the number of cents, c, that a customer received from a one-dollar bill after buying n candies each costing 5 cents?

A. c = 1 - 5n
B. c = 100 - 5n
C. c = 95n
D. c = 100 - 0.05n
E. c = 1.00 - 0.05n

Correct Answer: B


B. The key here is being able to tell your dollars from your sense (sorry, I mean cents). You want an expression in cents, and a dollar is 100 cents, so your answer is 100 - 5n.

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