Mathematics > Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer. 

On the last day of a one-week sale, customers numbered  through  were waited on. How many customers were waited on that day?

(A) 51
(B) 52
(C) 53
(D) 151
(E) 153

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The correct answer is C

Explanation

The number of customers who were waited on that day is , as the total number of customers is those customers numbered  to  inclusive.