SOLUTION: a group of students consists of 10 male freshmen, 15 female freshmen, 20 male sophomores, and 5 female sophomores. if one perosn is randomyl selected from teh group, find the proba

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Question 181532: a group of students consists of 10 male freshmen, 15 female freshmen, 20 male sophomores, and 5 female sophomores. if one perosn is randomyl selected from teh group, find the probability of selecting a freshman or a female.
Answer by Mathtut(3670) About Me  (Show Source):
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a group of students consists of 10 male freshmen, 15 female freshmen, 20 male sophomores, and 5 female sophomores. if one perosn is randomyl selected from teh group, find the probability of selecting a freshman or a female
:
P(fr or fe)=P(fr)+P(fe)=25/50+20/50=45/50 or 9/10