Question

Nayan sells two radio sets;one for 2,800 and the other for 4,200.On one he gains 20% and on the other set he loses 10%.Fimd his gain or loss per cent in the whole transaction... The right answ is 0 but how??? ​

Answer 1

Answer:

Total amount Nayan had = 2800+4200 = ₹7000

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\bold{Cp=2800}Cp=2800

\bold{profit = 20}profit=20

\bold{SP \: = ( \frac{100+20}{100} \times 2800)}SP=(

100

100+20

×2800)

\bold {=1.2×2800}=1.2×2800

\boxed{ = 3360}

=3360

--------------------------------------------------------

\bold{Cp=4200}Cp=4200

\bold{loss = 10}loss=10

\bold{SP = 4200 - ( \frac{100-10}{100} × 4200 )}SP=4200−(

100

100−10

×4200)

\bold{ = 4200×0.9 }=4200×0.9

\boxed{ = 3780}

=3780