A trader marked his goods at 20% above the cost price. He sold half the stock at the marked price, one quarter at a discount of 20% on the marked price and the rest a discount of 40% on the marked price. His total gain percent is:
2%
Let the trader has 100 goods.
Let C.P. of one good = Rs. 100. Then, Marked Price of one good = Rs. 120.
S.P of half stock = Rs.120×50=6000
S.P of one fourth stock = Rs.96×25=2400
S.P of other one fourth stock = Rs.72×25=1800
Total C.P = 10000 and Total S.P = 10200
Hence, gain\% =10200−1000010000×100=2%