A study of a cohort of 1,000 newborn animals showed a death rate of 40% 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 the 1,000 animals die, leaving 60% surviving. 60% of 1,000 is 600. In the second year, 80% of the remaining 600 animals die, leaving 20% surviving. 20% of 600 is 120.

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