Correct option is C
Given:
Number of pencils sold = 78
Profit = Selling Price of 13 pencils
Formula Used:
Profit % =
Solution:
Let the Selling Price (SP) of 1 pencil = ₹1
Then,
Total SP of 78 pencils = ₹78
Profit = ₹13
So, Cost Price (CP) = SP - Profit = ₹78 - ₹13 = ₹65
Now,
Profit % =
Profit % = 20%
Alternate Method:
Profit = 13 SP
CP = 78 SP - 13 SP = 65 SP
Profit % = = 20%