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erictan2046

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erictan2046: ½ð±Ò+3, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2015-10-28 21:45:05
C(10,2)*C(8,2)*C(6,2)*C(4,4)/P(3,3)=3150
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2Â¥2015-10-19 17:23:59
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erictan2046: ½ð±Ò+2, ¡ï¡ï¡ïºÜÓаïÖú 2015-10-28 21:39:43
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Wealldie.Let'sfaceit.
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C(10,4)*C(6,2)*C(4,2)*C(2,2)/3!=3150 .
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