A businessman sold two coolers for Rs. 9,900 each making 10% profit on one and losing 10% on the other. His gain or loss percentage on the two coolers ( in Percent )
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SP of first cooler=Rs 9900
Profit%=10%
CP of first cooler=100*9900/100+10 =Rs. 9000
SP of second cooler=Rs. 9900
Loss%=10%
CP of second cooler=100*9900/100-10 =Rs. 11000
Total CP=9000 +11000 =Rs. 20000
Total SP=9900+9900 =Rs. 19800
LOSS=20000-19800 =200
LOSS%= 200*100/20000 =1%