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# Paper test #14, section #5, question #12

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Paper test #14, section #5, question #12 [#permalink]  15 Nov 2005, 21:39
How to solve this problem?

In a certain pond, 50 fish were caught, tagged, and returned to the pond. A few days later, 50 fish were caught again, of which 2 were found to have been tagged. If the percent of tagged fish in the second catch approximates the percent of tagged fish in the pond, what is the approximate number of fish in the pond?

(A) 400
(B) 625
(C) 1,250
(D) 2,500
(E) 10,000
VP
Joined: 06 Jun 2004
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Re: Paper test #14, section #5, question #12 [#permalink]  15 Nov 2005, 21:46
maxrum wrote:
How to solve this problem?

In a certain pond, 50 fish were caught, tagged, and returned to the pond. A few days later, 50 fish were caught again, of which 2 were found to have been tagged. If the percent of tagged fish in the second catch approximates the percent of tagged fish in the pond, what is the approximate number of fish in the pond?

(A) 400
(B) 625
(C) 1,250
(D) 2,500
(E) 10,000

We know that 50 fish are tagged. Let x be the approx number of fish in the pond.

(2/50)=(50/x), solve for x.

Answer is C
Intern
Joined: 10 Oct 2005
Posts: 6
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[#permalink]  15 Nov 2005, 22:29
Thaks! It was easy
[#permalink] 15 Nov 2005, 22:29
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# Paper test #14, section #5, question #12

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