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# A manufacturer produced x percent more video cameras in 1994

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A manufacturer produced x percent more video cameras in 1994 [#permalink]  05 Aug 2006, 14:39
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A manufacturer produced x percent more video cameras in 1994 than in 1993 and y percent more video cameras in 1995 than in 1994. if the manufacturer produced 1000 video cameras in 1993, how many video cameras did he produce in 1995.

I. xy = 20
II. x + y + xy/100 = 9.2
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Re: DS problem [#permalink]  05 Aug 2006, 15:46
flowers24 wrote:
A manufacturer produced x percent more video cameras in 1994 than in 1993 and y percent more video cameras in 1995 than in 1994. if the manufacturer produced 1000 video cameras in 1993, how many video cameras did he produce in 1995.

I. xy = 20
II. x + y + xy/100 = 9.2

1993 => 1000
1994 => 1000(1+x/100)
1995 => 1000(1+x/100)*(1+y/100) => 10*[100+x+y+xy/100]

S1. xy = 20 insuff.
S2. 10*[100+9.2] = 1092 suff.

Hence B.
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The equation can be boiled down to the expression 2
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# A manufacturer produced x percent more video cameras in 1994

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