25. | | A shopkeeper sells one transistor for Rs. 840 at a gain of 20% and another for Rs. 960 at a loss of 4%. His total gain or loss percent is: | | (a)515/17% | | (b)516/17% | | (c)517/15% | | (d)615/17% |
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Answer is: ACP of 1st transistor = Rs. (100/120 X 840) = Rs. 700
CP of 2nd transistor = Rs. (100/96 X 960) = Rs. 1000
So, total CP = Rs. (700 + 1000) = Rs. 1700
Total SP = Rs. (840 + 960) = Rs. 1800
∴ Gain % = (100/1700 X 100)% = 515/17%