an amount of money is to be divided between p , q and r in the ratio of 3 : 7 : 12 . if the difference between the shares of p and q is rs . 4000 , what will be the difference between q and r ' s share ?
"4 - - - 4000 5 - - - ? = > 5000 answer : b"
multiply(subtract(12, 7), divide(4000, subtract(7, 3)))