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ratio

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ratio [#permalink] New post 27 Sep 2005, 18:59
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

I dont agree with the OA...

let me know what you guys think....
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 [#permalink] New post 27 Sep 2005, 19:06
Yeah... if Black is "exactly two dots" how is it in a ratio of 2:1:2 with red & green? Or am I reading it incorrectly?
Or is it... Exactly 2 Black and 1 Green for every 2 Red?
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 [#permalink] New post 27 Sep 2005, 20:01
Well, why bother with ratios? The question says the diagram has 2 black dots and 1 green dot for every 2 red dots.

This means something of this sequence: R,R,B,B,G

The diagram is incomplete if you do not have these 5 dots as the mix is no longer the same. So the total number of dots has to be a multiple of 5. From the answer choices, you have 3, 18, 36, 45, 52. Out of these 5 choices, only 45 is a multiple of 5 and therefore is a complete diagram.
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Re: ratio [#permalink] New post 28 Sep 2005, 01:37
fresinha12 wrote:
I dont agree with the OA...

let me know what you guys think....


I agree with the answer it has to be 45. The dots should be in the following sequence. R R B B G and since no other dots make a pair, and their are 5 dots in total, the answer should be a multiple of 5, and hence 45.
Re: ratio   [#permalink] 28 Sep 2005, 01:37
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