Since the events are not mutually exclusive, the probability becomes
Sample space = 23
Pr(Freshman) = 5/23
Pr(Off-campus) = 14/23
Pr(Freshman&Off-campus) = 3/23
Thus,
Pr( Freshman or Off- Campus) = 5/23 +14/23 - 3/23 = 16/23
Final answer = 16/23
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