Question

Suppose you are going to randomly sample one individual from a population of 130 people. In the population, there are 40 children 12 or younger, 60 teenagers, and 30 adults age 20 or older. What is the probability the individual you select will be...

4a. Either a teenager or an adult? (2 Points)

4b. Either a child or a teenager? (2 Points)

4c. Either a child or an adult? (2 Points)

Answer 1

There are total 130 people in which

40 are children 12 or younger then probability of selecting a children from 130 people is = 40/130

60 teenagers then the probability of selecting the teenager from 130 people is = 60/130

30 are adults with age 20 or more then the probability of selecting the adult from 130 people is = 30/130

One is selected randomly from 130 people

4a. Eithera teenager or an adult

probability the individual you select will be Either a teenager or an adult is as follows

=(Probably of selecting teenager + probability of selecting adult )

= 60/130 + 30/130

= 90/130

= 0.692307692

4b. Either a child or a teenager

probability the individual you select will be Either a child or a teenagers is as follows

=(Probably of selecting child + probability of selecting teenager)

= 40/130 + 60/130

= 100/130

= 0.769230769

4c. Either a child or an adult

probability the individual you select will be Either a child or an adult is as follows

=(Probably of selecting child + probability of selecting an adult)

= 40/130 + 30/130

= 70/130

=0.538461538