作业帮 > 数学 > 作业

1到20任意5个数相加等于50的组合有多少?

来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/21 15:04:09
1到20任意5个数相加等于50的组合有多少?
511种组合:
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