Question

Aarati bought 10 dresses at Rs.6300. She paid Rs.200 extra as expenses. If she sold all the dresses at the cost of Rs.780 per dress, how much percentage profit or loss does she make?

Answer 1

total cost=6300+200=6500
profit=780*10/6500*100 = 20%

Answer 2

$=( 6300 + 200{extra}) = 6500 \\ = she \: \:sold \: all \: dresses \: 780per \: piece \\ = then \: 10 \times 780 = 7800 \\ then \: profit \: is = 7800 - 6500 = 1300 \\ formula \: is = (profit \times) 100 \div a \: p \\ = (1300 \times 100) \div 6500 \\ = 20\%profit \\ (note -a \: p = 6500)$