with 1234can from how many different four-digit number?
问题描述:
with 1234can from how many different four-digit number?
不用翻译,写个过程就行了。好的给十分!
答
1234能重复吗?
如果不能重复.那就是4X3X2X1=24种
如果能重复,那就是4的4次方种
希望我的回答对你有帮助^-^
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