Scholars caught marked and released 80 fishes in a pond. Later 100 fishes were caught at random. 40 of them were marked. The number of fishes in the pond isA. 400B. 200C. 100D. 50

Scholars caught marked and released 80 fishes in a pond. Later 100 fis

1.	Scholars caught marked and released 80 fishes in a pond. Later 100 fishes were caught at random. 40 of them were marked. The number of fishes in the pond isA. 400B. 200C. 100D. 50
Answer» Correct Answer - B From mark and recapture method: N=(MR)/r` where, N-Population density. M-Number of marked fishes. R-Total numbe of recaptured fishes. r- Number of recaptured fishes that are marked. (M=80, R=100, r=40) `N=(80 xx 100)/40=200`

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Scholars caught marked and released 80 fishes in a pond. Later 100 fishes were caught at random. 40 of them were marked. The number of fishes in the pond isA. 400B. 200C. 100D. 50

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