week5_F10 - Online EE131A TA session Week 5 TA Ni-Chun Wang...

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Online EE131A TA session : Week 5 TA: Ni-Chun Wang [email protected]
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Midterm Review (Problem sets of 2009 Summer) 2
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(a) (A man sit on the first seat) => 4 x 4 x 3 x 3 x 2 x 2 x 1 x 1 (A woman sit on the first seat) => 4 x 4 x 3 x 3 x 2 x 2 x 1 x 1 > x 4 x x x x x x Total = 2 x (4 x 4 x 3 x 3 x 2 x 2 x 1 x 1) (b) Choose 1 man out of 4 to sit in the first seat, and let others choose their seat one at a time 4 7 4 x 7! 1 7 C P = 3
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