a , b and c invested rs . 6300 , rs . 4200 and rs . 10500 respectively , in a partnership business . find the share of a in profit of rs . 12500 after a year ?
6300 : 4200 : 10500 3 : 2 : 5 3 / 10 * 12100 = 3750 . answer : d
multiply(divide(6300, add(add(6300, 4200), 10500)), 12500)