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Suppose that of 300 mice in a mice colony born in January, 150 are still alive at the start of September, and 120 are still alive at the start of October.
-If the survivorship at the start of November is 0.3, how many mice died during the month of November?
A) 10
B) 20
C) 30
D) 60
E) 90

Question

Quizplus · Accepted Answer

If the survivorship at the start of November is 0.3, then 0.3 * 300 = 90 mice are still alive. Since 120 mice were alive at the start of October, 120 - 90 = 30 mice died during November.

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