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# If r and s are positive integers, r is what % of s (1) r

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Intern
Joined: 18 Feb 2008
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If r and s are positive integers, r is what % of s (1) r [#permalink]  29 Apr 2008, 17:31
If r and s are positive integers, r is what % of s
(1) r =3/4s
(2) r + s = 75/100

The answer is C can someone explain why ??
Director
Joined: 20 Feb 2008
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Location: Texas
Schools: Kellogg Class of 2011
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Re: data sufficiency [#permalink]  30 Apr 2008, 09:47
saurabhkowley18 wrote:
If r and s are positive integers, r is what % of s
(1) r =3/4s
(2) r + s = 75/100

The answer is C can someone explain why ??

I'm not sure about number 1, I would have gone with A myself. r/s = 3/4, that seems to say r is 75% of s to me.

As far as 2 is concerned, I would first convert 75/100 into 75%:

r + s = 75%, r = 75% - s

You then know you can't figure out the problem because you can't divide r by s to figure out the percentage. That would give you A in my book, but the answer is C.

Anyone know how you get C?
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Re: data sufficiency [#permalink]  04 May 2008, 11:50
This question is very similar to a question in OG 11th edition. Part B in the OG version is r/s instead of r+s. The OA is D for the OG version.

1) 1 is a ratio between the values.
sufficient
2) r and s cannot add to a fractional value if they are both positive integers(as the problem states). This is an impossibility. The question is deficient.
Re: data sufficiency   [#permalink] 04 May 2008, 11:50
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