Question

If one of the 255 subjects is randomly selected, find the probability that the person is under 21 years of age. State answer as a simplified fraction.

Answer 1

under 21 years of age= 40 25 20 tot= 85

between 21 and 40= 35 20 30 tot = 85

over 40= 20 30 35 tot = 85

If one of the 255 subjects is randomly selected

P (over 40) = 85/255 = 1/3

Hope this helps!