4个不同的求,4个不同的盒子,把球全部放入盒内恰好有一个盒子不放球,共有几种放法?从4个球抽出2个放在一盒子内,再从2个球抽出一个放一个盒子内,再拿最后一个球放一个盒子内,C4_2*A4_1*C2_1*A
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![4个不同的求,4个不同的盒子,把球全部放入盒内恰好有一个盒子不放球,共有几种放法?从4个球抽出2个放在一盒子内,再从2个球抽出一个放一个盒子内,再拿最后一个球放一个盒子内,C4_2*A4_1*C2_1*A](/uploads/image/z/7141178-2-8.jpg?t=4%E4%B8%AA%E4%B8%8D%E5%90%8C%E7%9A%84%E6%B1%82%2C4%E4%B8%AA%E4%B8%8D%E5%90%8C%E7%9A%84%E7%9B%92%E5%AD%90%2C%E6%8A%8A%E7%90%83%E5%85%A8%E9%83%A8%E6%94%BE%E5%85%A5%E7%9B%92%E5%86%85%E6%81%B0%E5%A5%BD%E6%9C%89%E4%B8%80%E4%B8%AA%E7%9B%92%E5%AD%90%E4%B8%8D%E6%94%BE%E7%90%83%2C%E5%85%B1%E6%9C%89%E5%87%A0%E7%A7%8D%E6%94%BE%E6%B3%95%3F%E4%BB%8E4%E4%B8%AA%E7%90%83%E6%8A%BD%E5%87%BA2%E4%B8%AA%E6%94%BE%E5%9C%A8%E4%B8%80%E7%9B%92%E5%AD%90%E5%86%85%2C%E5%86%8D%E4%BB%8E2%E4%B8%AA%E7%90%83%E6%8A%BD%E5%87%BA%E4%B8%80%E4%B8%AA%E6%94%BE%E4%B8%80%E4%B8%AA%E7%9B%92%E5%AD%90%E5%86%85%2C%E5%86%8D%E6%8B%BF%E6%9C%80%E5%90%8E%E4%B8%80%E4%B8%AA%E7%90%83%E6%94%BE%E4%B8%80%E4%B8%AA%E7%9B%92%E5%AD%90%E5%86%85%2CC4_2%2AA4_1%2AC2_1%2AA)
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