If each participant of a chess tournament plays exactly one game with each of the remaining participants, then 171 games will be played during the tournament. Find the number of participants.
Pick.
A) 15	B) 16	C) 17	D) 18	E) 19
Let P be the number of participants.   PC2 = 171   (P)(P-1) = 342 = 19*18   P = 19   The answer is 19.
<result>E</result>
If each participant of a chess tournament plays exactly one game with each of the remaining participants, then 171 games will be played during the tournament. Find the number of participants.