In a study of the population density of bullfrogs in a lake, 25 frogs are captured and marked in the first sampling.Five days later, 30 frogs are captured, 10 of which have marks.Based on these results, the estimated number of bullfrogs in this population is
A) 40.
B) 55.
C) 65.
D) 75.
E) 250.

Question

Quizplus · Accepted Answer

Using the mark-recapture method, the estimated population size (N) can be calculated using the formula: N = (number of marked individuals in first sample * total number of second sample) / number of marked recaptured individuals. So, N = (25 * 30) / 10 = 75.

In a Study of the Population Density of Bullfrogs in a Lake