Problem: in a games hour 4 different types of players came to the ground ? cricket 11 , hokey 15 , football 21 , softball 15 . how many players are present in the ground ?
Rationale: "total number of players = 11 + 15 + 21 + 15 = 62 answer is c"
annotated_formula: add(add(11, 15), add(21, 15))