In a Study of the Population Density of Apple Maggot

Multiple Choice

In a study of the population density of apple maggot flies, 150 flies are captured and marked in the first sample. Two days later, 300 flies are captured, 15 of which have marks. Based on these results, the estimated number of apple maggot flies in this population would be

A) 300.
B) 600.
C) 1,500.
D) 3,000.
E) 6,000.