Wasim bought two cricket bats for Rs. 840 and Rs.360 respectively. He sells the first bat at a gain of 15% and the second one at a loss of 5%. Find his gain or loss per cent in the whole transaction.

CP of first bat = Rs.840


SP of first bat



= (115 × 840) /100


= Rs.966


CP of second bat = Rs.360


SP of second bat



= Rs.342


CP of both the bat = 840 + 360


= Rs.1200


SP of both bats = 966 + 342


= Rs.1308


It is a case of Gain because SP is more than CP.


Gain = SP – CP


= 1308 - 1200


= Rs108




= 9%


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