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To find out the number of the carp in the pond, we marked 10 of them and put them back. After a w...

To find out the number of the carp in the pond, we marked 10 of them and put them back. After a while, we caught 10 of them again and counted the marked meat, and then we counted 2 of them. How many carp are there in the pond? And what are the basic assumptions for this?
math   Statistics-And-Probability   
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Answer #1

The per cent of tagged fish in the second catch is 2/10*100 = 20%.

The assumption is per cent of tagged fish in the second catch approximates the per cent of tagged fish in the pond.

20% approximates the per cent of tagged fish in the pond. Since there are 10 tagged fish, then we have

0.202, 10

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