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fish pond ps

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Director
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fish pond ps [#permalink] New post 14 Jan 2006, 04:41
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In a certain pond, scientists caught a number of 80 goldfish and labeled them, then let tem off. At the second time, they caught 80 goldfish at random, and found that five of them were labeled. IF the goldfish state in the pond is constant, what is the total number of goldfish?
Director
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 [#permalink] New post 14 Jan 2006, 07:26
May be some typo?
Not enough info for me!
Matt,duttsit, TeHCM?Guys any guesses?
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 [#permalink] New post 14 Jan 2006, 08:17
typo error.. few lines are missin I guess...
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 [#permalink] New post 14 Jan 2006, 13:44
i also believe there could be a typo somewhere.

no answer choices guys, sorry

oa is 1280

5/80=80/x

does this make sense?
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 [#permalink] New post 14 Jan 2006, 19:55
it means ...

the % of labelled fish in the second catch = % of labelled in the first catch

I beleive this line was missing .....!

so 5/80 = 80/x

x = total no of fish in the pound
which is = 1280
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 [#permalink] New post 14 Jan 2006, 21:59
oh man, i almost tried for 10min thinking tht i can solve it..
Director
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 [#permalink] New post 14 Jan 2006, 22:39
andy_gr8 wrote:
oh man, i almost tried for 10min thinking tht i can solve it..

I tried for a 30 secs!But still thought that I am Dumb)))
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  [#permalink] 14 Jan 2006, 22:39
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