Dr. Squarius wants to find out how many Canada Geese occupy the area around Lake Escherichia. So he and his Research Assistant (RA), Ms. Eri, set out shore nets to trap the birds. They managed to trap and fit 50 geese with neck bands. After 1 week, the RA returns to the site with a pair of binoculars and counts 130 geese, of which 30 geese had neck tags. From this data, approximately how many geese are estimated to be at the Lake

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