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Question

A man sells a TV set for Rs. 6,900 and makes a profit of 15%. He sells a second TV set at a loss of 10%. If on the whole, he neither gains nor loses, find the cost price of the second TV set.

A
Rs. 9,000
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B
Rs. 10,000
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C
Rs. 11,000
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D
Rs. 12,000
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Solution

The correct option is A Rs. 9,000

For first TV:
SP=Rs. 6,900
Profit =15%


Now, with this SP,

Profit %=SPCPCP×100

15=6900CPCP×100

6,900CP=0.15CP

1.15CP=6900

CP=Rs. 6000


Let the cost price of the second TV be x and it is given that there is a loss of 10%

So,

Loss %=CPSPCP×100

10=xSPx×100

xSP=0.10x

0.9x=SP(i)



Given, there is no profit or loss in the whole transaction that means total sales are equal to the total cost price of TV sets. So,

Total SP= Total CP

6900+0.9x=6000+x [From equation (i)]

69006000=x0.9x

900=0.1x

x=Rs. 9000


Thus, the cost price of the second TV is Rs. 9,000.


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