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There are 8 official and 4 non-official members, out of these 12 members a committee of 5 members is to be formed, then answer the following questions. (a) Number of committees consisting of at least two non-official members, are: (A) 456 (B) 546 (C) 654 (D) 466 (b) Number of committees in which a particular official member is never included, are: (A) 264 (B) 642 (C) 266 (D) 462

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