Sachin sells 2 watches for Rs. 1955 each gaining 15% on one and loosing 15% on the other find
the gain or loss percentage on whole?
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Answer:
Selling price of two watches
SP = 2*1955 = 3910
Cost price of first watch = CP1
Cost 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 %
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