Question

if 11 pens are bought at rupees 10 per one pen and sold 10 pens at rupees 11 for one pen what is the profit

Answer 1

11 pens brought 10 rupees per pen means cost of 1 pen is rs 10

cost of 10 pens = 10 *10= Rs 100

10 pens are sold at rupees 11 for 1 pen means selling price of 1 pen is Rs 11

selling price of 10 pens = 11*10= Rs 110

profit by selling 10 pens

= cost price - selling price

= Rs 110 - Rs 100

= Rs 10

profit per pen= Rs 100÷ 10 = Rs 1

Answer 2

SELLING PRICE FOR 10 PEN IS =10×10=100

COST PRICE FOR 10 PEN=10×11=110

PROFIT= S.P - C.P = 110-100=10

BUT HE HAD NOT SOLD 1 PEN WORTH RS 10

THEREFORE TOTAL PROFIT=PROFIT-10

=10-10=0