A hair stylist placed an ad on the home page of the online community shopper website.

Daily site visit demographics indicate the following age categories of visitors:

Age Category Age Range Percent of Site Visits

A Younger than age 18 10

B Ages 18 to 24 13

C Ages 25 to 36 15

D Ages 37 to 51 27

E Ages 52 to 63 21

F Age 64 and older 14

What is the probability that either a person in age category D or a person in age category E will view the advertisement, assuming there is no relationship between the site visitors?