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Question

Three articles are sold for Rs.1,890,Rs.2,400 and Rs.1,135 respectively. The first article is sold at 12.5% profit and the second at 20% profit. If on the whole a loss of 318% is made, find the cost price of the third article.

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Solution

Given, for the first article
S.P=Rs1,890
Profit =12.5 %
Now, with this S.P. and for Profit % =S.P.C.P.C.P.×100=12.5 %
=>1,890C.P.C.P.×100=12.5
=>1,890C.P.=0.125C.P.
1.125C.P.=1,890
=>C.P.=Rs1,680

And for another TV,
S.P=Rs2,400
Profit =20 %

So, Profit % =S.P.C.P.C.P.×100=20
=>2,400C.P.C.P×100=20
=>2,400C.P.=0.20C.P.
=>1.2C.P=2,400
=>C.P.=Rs2,000


Now Total S.P. =Rs1,890+Rs2,400+Rs1,135=Rs5,425

And Total Loss % =TotalC.P.TotalS.P.TotalC.P.×100=258 %
=>TotalC.P.5,425TotalC.P.×100=258
on solving we get
Total C.P =Rs5,600


Hence, C.P. of third article = Rs5,600Rs1,680Rs2,000=Rs1,920


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