Question

a pen cost rs 2. 50 rupees how many pens can you buy with a 50 ruppes note

Answer 1

Here 1 pen cost = 2.50
Now according to question
50/2.50
=200

Answer 2

In 2.50 rupree number of pen is 1 In 1 rupee number of pen = 1/2.50 Henc, In 50rupee number of pen = 1/2.50×50 = 20 .