SSC CPO SI and ASI Model Paper 8

(1) Let us assume that it was possibleto buy x items with ₹ 90 beforeprice reduction.
Amount required to purchasex items = 80% of 90 = ₹ 72
After price reduction, one can buy(x + 15) items with₹90
∴Reduced price of 15 items= 90 – 72 = ₹ 18
⇒ Reduced price of one item =$\frac{18}{15}$
= $\mathit{₹}1.20$