英语翻译How many numbers greater than 4000 can be formed with th
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英语翻译
How many numbers greater than 4000 can be formed with the digits 2,3,4,5 and 6 if no digit is used more than once in a number?
不要用百度有道金山...的翻译 ,我都用过了,不行
How many numbers greater than 4000 can be formed with the digits 2,3,4,5 and 6 if no digit is used more than once in a number?
不要用百度有道金山...的翻译 ,我都用过了,不行
用2,3,4,5,6这5个数字来组合一个新的组合数字,并且每个数字只能用一次,有多少种组合是大于4000的?
假如是4位数:3x4x3x2=96
假如是5位数:5x4x3x2x1=120
两种可能性相加:120+96=216
所以有216种排列组合可能性.
假如是4位数:3x4x3x2=96
假如是5位数:5x4x3x2x1=120
两种可能性相加:120+96=216
所以有216种排列组合可能性.
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