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Exactly how many of the 18 persons on a college's debating team are seniors?
Senior + Not Senior= 18

(1) There are more than 14 seniors on the debating team.
S> 14 (Seniors can be 15,16,17,18)
Insufficient

(2) The number of persons on the debating team who are not seniors is 3.
S+NS=18 ; S+3=18; S=18-3=15
Sufficient

B
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