A store has an offer 'Buy 4 Get 1 Free'. What is the net percentage of discount ?

A. 25%

B. 33.3%

C. 20%

D. Insufficient Data

Answer: Option C

Solution(By Examveda Team)

Let, Marked price of the thing is Rs. 100

SP	Discount	MP
400	100	500

$$\eqalign{ & \therefore {\text{Discount}}\% \cr & = \frac{{100}}{{500}} \times 100 \cr & = 20\% \cr} $$