Question

a shopkeeper purchased 200 bulbs for rs10 each and decided to sell them at rs12 .thus he calculated his profit as

Answer 1

cost of 1 bulb=10 so cost of200 bulb=200×10=2000rs
selling price of one bulb=12
therefore 200 bulb=12×200=2400
now profit =selling price-cost price=2400-2000=400rs for 200 bulbs
therefore profit for one bulb is 400÷200=2rs

Answer 2

cost price =Rs 10
selling price =RS12
PROFIT=SP-CP
=12-10
=2