Question

a student buys 10 pens for rupees 90 and sold them at rupees 12 each find his profit percentage​

Answer 1

Cost of ten pen = Rs 90

Cost of one pen = 90÷10

=Rs9

if they sold it at 12 at each then,

= 10×12

=Rs 120

now,

profit = Sp- Cp

= 120-90

= Rs 30

P%= Profit amount of Sp

= 30÷100×120

= 36%

Answer 2

Answer:

$33 \frac{1}{3} \%$