Question

A man buys m no. Of pens for rs. N each and sells n no. Of pens for rs. M each. Then what is the profit he have earned?

Answer 1

Answer:

Step-by-step explanation:

Cost price=no.of pen*cost of one pen

=mN

Selling price=no. of pen*cost of one pen=nM

Profit=selling price - cost price

=nM - mN