1.

A dishonest dealer professes to sell his goods at cost price, but uses a weight of 900 grams for a kilogram weight. Find his real gain per cent.

A.  \[{{a}_{1}}:{{a}_{2}}::{{b}_{1}}:{{b}_{2}}\]
B. 0.12
C. 11% 
D. 0.132
Answer» B. 0.12


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