The correct option is A 20% loss
Given: Cost price of a dozen packets of sweets = ₹ 1200
∴ Cost price of 1 packet of sweet
= 120012 = ₹100 (1 dozen =12)
Anu buys 10 packets of sweets
Hence, Anu's cost price = 10×100 = ₹1000
Anu sells the sweets for ₹800
∵ S.P < C.P, Anu has a incurred a loss
Loss incurred by Anu = 1000 - 800 = ₹200
Loss% = lossCost price×100
= 2001000×100 = 20%
∴ Loss percent = 20%