The lifespans of gorillas in a particular zoo are normally distributed. the average gorilla lives 20.8 years; the
standard deviation is 3.1 years.
use the empirical rule (68 – 95 - 99.7%) to estimate the probability of a gorilla living less than 23.9
years.

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)