A certain number of articles are bought at 3 for 150 and all of them are sold at 4 for 180. Find the lose or gain as percent.
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Answer:
3 article cp=150
therefore 1 article cost=150/3=50
sp of 4 article=180
therefore sp of 1 article=180/4=45
therefore loss=50-45=5
loss percent=(5/50)*100%=10%
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