Pens that used to cost tk. 150 for a package of 3 now cost tk. 300 for a package of 5. What is the percentage increase in the price of these pens?

A. 15

B. 20

C. 25

D. 30

Answer: Option B

Solution(By Examveda Team)

Earlier Cost of one pen = 150/3 = tk 50
Now Cost of one pen = 300/5 = tk 60
Increase in price = (1 - 60/50) x 100 = 20%