A study of a cohort of 1,000 newborn animals showed a death rate of 40 percent per individual in year one and a death rate of 80% per individual in year two. The quantity of survivors after two years is about ____.

Question

Quizplus · Accepted Answer

In the first year, 40% of 1,000 animals die, leaving 60% surviving: 1,000 * 0.60 = 600 survivors. In the second year, 80% of these 600 survivors die, leaving 20% surviving: 600 * 0.20 = 120 survivors after two years.

A Study of a Cohort of 1,000 Newborn Animals Showed