In a Major Midwestern University,55% of All Undergraduates Are Female,25

In a major Midwestern university,55% of all undergraduates are female,25% belong to a Greek organization (fraternity or sorority) and 40% of all males belong to a Greek organization. What is the probability that one randomly selected undergraduate will be either a female or belong to a Greek organization?

A) .55
B) .73
C) .80
D) .07
E) .87