a , b and c have rs . 600 between them , a and c together have rs . 250 and b and c rs . 450 . how much does c have ?
"a + b + c = 600 a + c = 250 b + c = 450 - - - - - - - - - - - - - - a + b + 2 c = 700 a + b + c = 600 - - - - - - - - - - - - - - - - c = 100 answer : d"
subtract(add(250, 450), 600)