If you bought a pen worth Rs. 5.50 and a notebook worth Rs. 20.75 and paid the shopkeeper Rs. 30, how much will he return to you?
3.75
Amount paid = Rs. 30
Total bill = Cost of pen + Cost of notebook
= Rs.5.50 + Rs. 20.75 = Rs. 26.25
Amount to be returned = Amount paid - Total bill
= Rs. 30 - Rs.26.25 = Rs. 3.75