Question

Valli purchases 10 pens for ₹ 180 and Kamala buys 8 pens for ₹ 96. Can you say who bought the pen cheaper?
(using unitary method)

Answer 1

Using unitary method, we can solve this as follows:

Cost of 10 pens for Valli = ₹ 180

Cost of 1 pen = $\frac{\text{'}180}{10}$ = ₹ 18

Cost of 8 pens for Kamala = ₹ 96

Cost of 1 pen = $\frac{96}{8}$ = ₹ 12

As the cost of 1 pen for Kamala is less, hence she bought it cheaper.