27楼 白云外再不来 | 发表于2022-10-29 16:15:16
给出的数据是:有x个(行)号码(号码可能是6码/8码/15码的),x为30~50
“任选其中3-6行全排复式并集”中的“任选”和“全排复式”不是很理解。是指要得到x行号码中,全部的x选3、x选4、x选5、x选6的组合的并集吗?
假设x为7行:
1行
2行
3行
4行
5行
6行
7行
得到3行间的组合35个:
123,124,125,126,127,134,135,136,137,145,146,147,156,157,167,234,235,236,237,245,246,247,256,257,267,345,346,347,356,357,367,456,457,467,567
得到4行间的组合35个:
1234,1235,1236,1237,1245,1246,1247,1256,1257,1267,1345,1346,1347,1356,1357,1367,1456,1457,1467,1567,2345,2346,2347,2356,2357,2367,2456,2457,2467,2567,3456,3457,3467,3567,4567
得到5行间的组合21个:
12345,12346,12347,12356,12357,12367,12456,12457,12467,12567,13456,13457,13467,13567,14567,23456,23457,23467,23567,24567,34567
得到6行间的组合7个:
123456,123457,123467,123567,124567,134567,234567
一共得到98个行组合
那么给出30行时就有767746种行组合,给出50行时就有18259360种组合了
再分别得到上面每种行组合的号码并集与33个红球的差集?