2.A shopkeeper sells two watches for 1955 each, gaining 15% on one and

1.	2.A shopkeeper sells two watches for 1955 each, gaining 15% on one and losing 15% on the\| 3.other. Find gain or loss percent in the whole transaction.6.
Answer» Selling price of two watchesSP = 21955 = 3910 Cost price of first watch = CP1Cost price of second watch = CP2 1955 = CP1(1 + 15/100)CP1 = 195520/23 = 8520 = 1700 1955 = CP2(1 - 15/100)CP2 = 195520/17 = 11520 = 2300 Total Cost price CP = 1700 + 2300 = 4000 Loss% = [(CP - SP) /CP]100= [(4000 - 1955)/4000]*100= 45/40= 1.125 %

2.A shopkeeper sells two watches for 1955 each, gaining 15% on one and losing 15% on the| 3.other. Find gain or loss percent in the whole transaction.6.

Answer»

Selling price of two watchesSP = 2*1955 = 3910

Cost price of first watch = CP1Cost price of second watch = CP2

1955 = CP1(1 + 15/100)CP1 = 1955*20/23 = 85*20 = 1700

1955 = CP2(1 - 15/100)CP2 = 1955*20/17 = 115*20 = 2300

Total Cost price CP = 1700 + 2300 = 4000

Loss% = [(CP - SP) /CP]*100= [(4000 - 1955)/4000]*100= 45/40= 1.125 %