A shop owner sells two pipes at the same price On one he makes a profit of 20 and on the other he su...........

Quantitative Aptitude (CDS) Profit and loss

A shop owner sells two pipes at the same price. On one he makes a profit of 20% and on the other, he suffers a loss of 20%. Find his loss or gain percent on the whole transaction?

10% profit

10% loss

No gain, No loss

20%

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Explanation:

let cost price is C.P
let profit S.P=x and loss S.P=y
profit 20%= (S.P-C.P)/C.P
20/100 =(S.P-C.P)/C.P
1=5(x-C.P)/C.P
C.P=5 x-5 C.P
C.P=5x/6
loss 30%=(C.P-y)/C.P
3/10=(C.P-y)/C.P
3 C.P=10 C.P-10 y
C.P=10y/7
total cost price is =2 C.P
total selling price is =x+y
=6 C.P/5+7 C.P/10
=19 C.P/10
loss %=(2 C.P-19 C.P/10)/C.P
=10%