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If apples are bought at the rate of 30 for a rupee. How many

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If apples are bought at the rate of 30 for a rupee. How many [#permalink] New post 09 Nov 2003, 04:05
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A
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If apples are bought at the rate of 30 for a rupee. How many apples must be sold for a rupee so as to have a profit of 20%?

(1) 28 (2) 25
(3) 36 (4) 22
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 [#permalink] New post 10 Nov 2003, 23:57
0.2E=R-E
1.2E=R

(120/100)*(1/30)=1/X
4/100=1/X
X=25
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 [#permalink] New post 14 Jan 2004, 11:01
Slightly different appraoch.

C(per apple) = A(amount) / N ( no of apples )
so C1 = A/N1 so A = C1N1
A = C2N2 = C1N1
N2 = C1N1/C2 N1=30, C2 = 1.2C1 (20% profit)
so N2 = C1 * 30 / ( 1.2 * C1 ) = 25
  [#permalink] 14 Jan 2004, 11:01
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If apples are bought at the rate of 30 for a rupee. How many

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