GMAT Paper Test 14 #12

[mayonnai5e]

I cannot seem to figure out what the trick on this problem is:

12. 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

[ri2007]

My answer would be 1250.

Here is my logic.

Total fish tagged = 50
Total fish tagged out of the second catch = 2/50 = 4%
Now 4% corresponds to 50
so 100% should be 1250

Pls confirm

Thanks

[mayonnai5e]

OH HAHAHA!

"Total fish tagged = 50" --> This was the crucial piece I was missing. For some reason, my brain did not see this piece of information even after 2 or 3 rereads of the problem.

Thanks!