alleryChoose exactly 3 of A–F. A requires B; C requires D; exactly one of B,E is chosen; F requires C; at least one of A,F is chosen. Which pair must be excluded?
ABD
BDF
CAE
DCF
Answer & Solution
Correct answer: D. CF
F would force C,D and violate the B/E rule, while choosing C after A,B would need a fourth member, so C and F are excluded.
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