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 . 2400 , what will be the difference between q and r ' s share ?
"4 - - - 2000 5 - - - ? = > 3000 answer : b :"
multiply(subtract(12, 7), divide(2400, subtract(7, 3)))