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# What is the total gain or loss percent if a shopkeeper sells one transistor for Rs 840 at a gain of 20% and another for Rs 960 at a loss of 4%?

C.P=S.P/(1+loss/gain%) Thus , C.P(1+/- loss/gain%)=S.P In first case, we gain 20%, so cp(1+0.2)=S.P, C.P(1.2)=840, solving which we get C.P as 700. Now taking second case of loss of 4%, Cp(1-0.04)=S.P, solving which we get C.P as 1000. Now, total C.P =700+1000=1700, and total S.P as 840+960=1800 Thus,...
C.P=S.P/(1+loss/gain%) Thus , C.P(1+/- loss/gain%)=S.P In first case, we gain 20%, so cp(1+0.2)=S.P, C.P(1.2)=840, solving which we get C.P as 700. Now taking second case of loss of 4%, Cp(1-0.04)=S.P, solving which we get C.P as 1000. Now, total C.P =700+1000=1700, and total S.P as 840+960=1800 Thus, total gain is, (1800-1700)/1700*100=5.8% gain. read less

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