there are 10 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 9 teams . . . so total no of matches = 10 x 9 = 90 . now , each match is played twice = > 90 x 2 but 2 teams play a match = > 90 x 2 / 2 = 90 . answer : e"
divide(multiply(10, subtract(10, const_1)), const_2)