b) 9 randomly selected 2-year-old male chipmunks will live to be 3 years old.
[tex](0.99085)^9\approx0.92060[/tex]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:
[tex]1-0.99085=0.00915[/tex]Probability that none of the nine will live to be 3 years old is:
[tex](0.00915)^9=4.4956\times10^{-19}[/tex]Probability that at least one of nine randomly selected 2-year-old male chipmunks will not live to be 3 years old:
[tex]1-4.4956\times10^{-19}\approx1[/tex]Answer c: it approximates to 1
