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82问答网 > 从a、b、c、d这4个字母中，每次取出3个按顺序排成一列，共有种不同的排法．

从a、b、c、d这4个字母中，每次取出3个按顺序排成一列，共有种不同的排法．

2025-04-03 23:35:44

推荐回答（1个）

回答1：

有据题意，可知应采用乘法计数原理，（分步相乘)，即N=4×3×2=24.而此时的数值为排列数，并不是排列，若想求解，应将24种不同排列方式用树状图等方式表示出来即：
abc bac cab dab
abd bad cad dac
acb bca cba dba
acd bcd cbd dbc
adb bda cda dca
adc bdc cdb dcb

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