100 pens cost x dollars. How many pens can be purchased for 50 cents, assuming the same rate?

Solution:

Given,

Cost of 100 pens = x dollars.

Cost of 1 pen = x/100 dollars

Number of pens that can be purchased for 50 cents i.e. 0.5 dollars.

Cost of n pens = Number of pens that can be purchased/cost of 1 pen

Substituting the values

= (0.5 dollars) / (x/100dollars)

So we get

= 50/x pens

Therefore, 50/x pens can be purchased for 50 cents.

100 pens cost x dollars. How many pens can be purchased for 50 cents, assuming the same rate?

Summary:

If 100 pens cost x dollars, for 50 cents 50/x pens can be purchased.