The balance of a trader weighs 10% less than it should. Still the trader marks up his goods to get an overall profit of 20%. What is the mark up on the cost price?\nOptions:\n(A) 40%\n(B) 8%\n(C) 25%\n(D) 16.66%\n(E) 9% Stream of consciousness first, then make a decision:
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Original cost before weight adjustment: X\nCost after 90% weight adjustment: 9/10 X\n20% profit on 9/10X: (120/100)(9/10)(X) or 108X/100\nMark up on original cost of X: (108X/100)/X-1 = 8/100
Thus, the answer is (B).
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