In a certain conference room each row of chairs has the same number of chairs, and the number of rows is 1 less than the

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In a certain conference room, each row of chairs has the same number of chairs, and the number of rows is 1 less than the number of chairs in a row. How many chairs are in a row?

(1) There is a total of 72 chairs.
(2) After 1 chair is removed from the last row, there is a total of 17 chairs in the last 2 rows.

Answer: D

Source: GMAT Prep