there are 15 teams in a certain league and each team plays each of the other teams exactly twice . if each game is played by 2 teams , what is the total number of games played ?
"every team plays with 14 teams . . . so total no of matches = 15 x 14 = 210 . now , each match is played twice = > 210 x 2 but 2 teams play a match = > 210 x 2 / 2 = 210 . answer : e"
divide(multiply(15, subtract(15, const_1)), const_2)