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A class of 40 set out to determine the population of lizards in a bound field measuring 200 metres by 100 metres using the capture-recapture method.

In their first outing, the students captured a total of 360 lizards all of which were marked with indelible ink and then released back into the field.

After a one week interval the students went back into the field and caught a total of 250 lizards out of which 150 bore the indelible ink mark.

The population density of the lizards in the field is?

A. 0.003 per m ²
B. 0.03 per m ²  
C. 3 per m ²
D. 4 per m ²
E. 6 per m ²

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Correct Answer: B