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Of students at a particular university: 20% are freshmen 22% are sophomores 23% are juniors 28%...

Of students at a particular university: 20% are freshmen 22% are sophomores 23% are juniors 28% are seniors 7% are graduate students. Note that these classifications are mutually exclusive. Additionally, 60% of students are female. You may assume that being female is independent of the above classifications. If a student is selected at random, what is the probability the selected student will be either a freshman or a sophomore? Group of answer choices None of the other choices represent a suitable response.

.376

.416

.420

.400

math   Statistics-And-Probability   
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Answer #1

P(freshman) =0.2
P(sophomore) = 0.22

P(freshman or sophomore) = 0.2 + 0.22
= 0.420

Option C

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