Cost price of a pen is 50 Rs. and that ofÂ notebook is 140 Rs. If pen is sold atÂ 200% profit, then to purchase 10 suchÂ note books how many pens are requiredÂ to sell if only profit money is used to buyÂ notebooks?

Cost price of a pen is 50 Rs. and that ofÂ notebook is 140 Rs. If pe

1.	Cost price of a pen is 50 Rs. and that ofÂ notebook is 140 Rs. If pen is sold atÂ 200% profit, then to purchase 10 suchÂ note books how many pens are requiredÂ to sell if only profit money is used to buyÂ notebooks?
A.	14
B.	18
C.	15
D.	20
Answer» B. 18