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  1. A balance of a trader weighs 10% less then it should be. still the trader marks-up his goods to get the overall profit of 20%. What is the mark up on the cost price ?
    1. 40%
    2. 8%
    3. 25%
    4. 16.66%
Correct Option: B

Let the CP be Rs. 1 per g
but he weighs 900 g for every 1000 g
∴ value of goods sold = 900
Now, let the markup be x%
∴ MP = 1000 + 1000x / 100 = ( 1000 + 10x )
but since MP = SP,
∴ SP = ( 1000 + 10x )

Hence, profit (%) = [{( 1000 + 10x ) - 900} / 900] x 100 = 20

⇒ x = 8

Thus the markup = 8%


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