Question

Example 4.
The price of a ball pen & a gel pen is same. Now
the price of ball pen is decreased by 30%. While of
gel pen is increased by 20%. Find out the net
percentage change in the net total price of both
pens.​

Answer 1

Answer:

If price of pen decrease by 20% or 1/5 then the quantity of additional pens that can be bought is 1/(5 - 1) = 1/4th.

If original number of pens = q, then :

1/4q = 10

=> q = 40

New Quantity = 40 + 10 = 50

New Price = 100/50 = Rs 2

Answer 2

Answer:

If price of pen decrease by 20% or 1/5 then the quantity of additional pens that can be bought is 1/(5 - 1) = 1/4th.

If original number of pens = q, then :

1/4q = 10

=> q = 40

New Quantity = 40 + 10 = 50

New Price = 100/50 = Rs 2

Step-by-step explanation:

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