A manufacturer sells a pair of plastics to a wholesale dealer at a profit of 18%. The wholesaler sells the same to retailer at a profit of 20%. The retailer in turn sells them to a customer for Rs. 30.09, there by earning a profit of 25%. The cost price for the manufacturer is: Choose the correct choice from the following answers:
A) 23
B) 16
C) 17
D) 45
E) 28
C   Let the cost price for the manufacturer be Rs. x. Then, 125% of 120% of 118% of x = 30.09.   125/100 * 120/100 * 118/100 * x = 3009/100   177/100 x = 3009/100 =&gt; x = 17
<result>C</result>
A manufacturer sells a pair of plastics to a wholesale dealer at a profit of 18%. The wholesaler sells the same to retailer at a profit of 20%. The retailer in turn sells them to a customer for Rs. 30.09, there by earning a profit of 25%. The cost price for the manufacturer is: