there are 9 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 ?
"9 players are there . two players play one game with one another . so 9 c 2 = 9 x 8 / 2 = 36 so option c is correct"
divide(multiply(9, subtract(9, const_1)), const_2)