Question

1 points Save Answer Question 17 Find the indicated probability. Express your answer as a simplified fraction unless otherwise noted The table below shows the soft drinks preferences of people in three age groups under 21 years of age cola root beer lemon-lime between 21 and 40 35 over 40 years of age 20 30 35 If one of the 255 subjects is randomly selected, find the probability that the person is over 40 years of age given that they drink root beer. 02 17 None of the above is correct. 17

Answer 1

Let A be an event that the observations are above 40 years of age. Let B be an event that the observations drink root beer. p(A/B) = p(A intersection B) /p(B) p(A intersection B) = 30/255 p(B) = 75/255 p(A/B) = 30/75 = 2/5 = 0.4