A poll was conducted of 1500 randomly selected voters to det

A poll was conducted of 1500 randomly selected voters to determine their current presidential candidate preferences. Voters were also asked their age in years (18 to 39 or 40+). See attached table

Find the probability that a randomly selected voter preferred:
A.) The independent candidate and is 18 - 39:

B.) The independent candidate or is age 18 - 39:

C.) The independent candidate given that viewer is age 18 - 39:

Solution

A) P(Independent AND 18-39) = 113/1500 = 0.075 Answer

B)  P(Independent OR 18-39) = (289 +526-113)/1500 =0.468 Answer

C)  P(Independent /18-39) = P(Independent AND 18-39) /P(18-39) = 113/526 = 0.215 Answer