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selling 10 oranges

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selling 10 oranges

by sanju09 » Tue Jan 12, 2010 5:31 am
By selling 10 oranges a vendor gains the selling price of two oranges. What is his gain percent?
(A) 20
(B) 22 ½
(C) 25
(D) 27 ½
(E) 30
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by truplayer256 » Tue Jan 12, 2010 5:34 am
Oranges sell for x dollars each and are bought for y dollars each.

10x-10y=2x

x-y=x/5

y=4x/5

10x-8x/(8x)*100=25%
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