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The probability that a randomly selected 2-year-old male chipmunk will live to be 3 years old is 0.99085.(b) What is the probability that nine randomly selected 2-year-old male chipmunks will live to be 3 years old?(c) What is the probability that at least one of nine randomly selected 2-year-old male chipmunks will not live to be 3 years old?

User Jubueche
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b) 9 randomly selected 2-year-old male chipmunks will live to be 3 years old.


(0.99085)^9\approx0.92060

Answer b: 0.92060

c) probability that at least one of nine randomly selected 2-year-old male chipmunks will not live to be 3 years old

Probability that one randomly selected 2-year-old male chipmunk will NOT live to be 3 years old:


1-0.99085=0.00915

Probability that none of the nine will live to be 3 years old is:


(0.00915)^9=4.4956*10^(-19)

Probability that at least one of nine randomly selected 2-year-old male chipmunks will not live to be 3 years old:


1-4.4956*10^(-19)\approx1

Answer c: it approximates to 1

User Kaksat
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