The correct option is A 20% profit
Cost price of 10 dresses is Rs. 6300 and expanses is Rs. 200.
So, cost price after expanses=Rs. (6300+200)=Rs. 6500
Also, selling price of 1 dress is Rs. 780.
Hence, selling prince 10 dresses=10×780=Rs. 7800
Now, SP>CP, so their will be net profit.
So, profit percent is,
Profit(%)=7800−65006500×100=130065=20%