A merchant has announced 25% rebate on prices of ready-made garments at the time of sale. If a purchaser needs to have a rebate of Rs. 400, then how many shirts, each costing Rs. 320, should he purchase?
Answers:
A) 10  B) 7  C) 6  D) 5  E) 4
Solution: Discount on one shirt,   = 25% of 320 = 320*25/100 = Rs. 80.   Hence, number of shirt he must buy to get a rebate of Rs. 400 = 400/80= 
<gadget id="calculator">400/80</gadget>
<output>5</output>
5.   Answer: Option 5
<result>D</result>
A merchant has announced 25% rebate on prices of ready-made garments at the time of sale. If a purchaser needs to have a rebate of Rs. 400, then how many shirts, each costing Rs. 320, should he purchase?