P sells a bottle to Q at a profit of 30 percent and Q sells it to R at a profit of 20 percent. What is the ratio of cost prices of P and R?

24:35 25:39 12:17 13:19

25:39

P                       Q                           R Let CP         100--30%P------130------20%P-------156 cost price of P : R = 100 : 156 = 25:39