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4. Kaajal has a large fish pond in her backyard. One day she caught 20 fish, tagged them and put them back into the pond, hoping to use these tagged fish to approximate the number of fish in the pond. A few hours later she caught 40 fish of which 8 were tagged. About how many fish does Kaajal have in her pond? \( A , 200 \) 3.16 100 2.8

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