In a Mark-Recapture Study to Estimate the Size of a Rodent

Multiple Choice

In a mark-recapture study to estimate the size of a rodent population, researchers catch and mark 30 individuals. Two days later, they again capture a number of rodents and find that 20% of the individuals are marked. Assuming no births, deaths, or migrations, what is the estimated size of the population?

A) 60
B) 90
C) 150
D) 300