There are 20 players in a chess group, and each player plays each of the others once. Given that each game is played by two players, how many total games will be played? Select:
A) 10	B) 30	C) 190	D) 60	E) 90

Rationale: "20 players are there . two players play one game with one another . so 20 c 2 = 20 * 19 / 2 = 190 so option c is correct"
Answer: C