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OpenStudy (anonymous):
An exam consists of six true-or-false questions. Assuming that every question is answered, in how many different ways can a student complete the exam? In how many ways may the exam be completed if a penalty is imposed for each incorrect answer, so that a student may leave some questions unanswered? A) 108; 72 B) 92; 1,439 C) 64; 729 D) 66; 225 E) 15; 1,316 F) 72; 536
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