A marine biologist wanted to estimate the number of fish in a large lake. He threw a net and found 30 fish in the net. He marked all these fish and released them into the lake. The next morning he again threw the net and this time caught 40 fish, of which 2 were marked. The approximate number of fish in the lake is :(adsbygoogle = window.adsbygoogle || []).push({});

a)600

b)1200

c)68

d)800

e)120

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# Probability problem (came in TIFR)

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