Question

Pinky paid ₹36 for 3 copies and 2 pens .A pen cost 3 times as much as a copy. How did she pay for a pen?

Answer 1

Answer:

A pen costs ₹12

Step-by-step explanation:

Let c be the price of a copy and p the price of a pen.

A pen costs 3 times as much as a copy, so

p = 3c      ... (1)

The cost of 3 copies and 2 pens is 36, so

3c + 2p = 36      ... (2)

Substituting (1) into (2) gives

p + 2p = 36

=> 3p = 36

=> p = 12.