In a certain animal population, for each of the first 3 months of life, the probability that an animal will die during that month is 1/10. For a group of 250 newborn members of the population, approximately how many would be expected to survive the first 3 months of life?
Choices.
A) 140 B) 146 C) 152 D) 162 E) 183
The probability of survival for each of the first 3 months of life is 1-1/10=9/10, so of 250 newborn 250*9/10*9/10*9/10=~183 is expected to survive.   Answer: 183.
<result>E</result>
In a certain animal population, for each of the first 3 months of life, the probability that an animal will die during that month is 1/10. For a group of 250 newborn members of the population, approximately how many would be expected to survive the first 3 months of life?