Maths Olympiad Prep

Library / /228 of 387

, 2001

Combinatorics Difficulty 2.0 Junior Find the answer Canada

The 6 members of an executive committee want to call a meeting. Each of them phones 6 different people, who in turn each calls 6 other people. If no one is called more than once, how many people will know about the meeting?

(A) 1818 (B) 3636 (C) 216216 (D) 252252 (E) 258258

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Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.