7. The marked price of a computer is * 22,000. After allowing 10% discount
dealer still makes a profit of 20%. Find the cost price of a computer
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The market price of the computer is Rs 22000.
After 10% discount ,its cost be
= Rs [ 22000 -(22000× 10 %)]
= Rs [ 22000-(22000×10/100]
= Rs (22000-2200)
= Rs 19800
Let us take the cost price of the computer be Rs x
The dealer made a profit of 20℅
Then , its selling price are
=Rs [x+(x ×20℅)]
= Rs (x+x÷ 5)
= Rs (6x%5)
By the given conditions,
6x/5 = 19800
= x=19800×5/6
= x= 16500
Therefore, The cost price of the computer is Rs 16500
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