SAT OG 数学p547 为什么我怎么数都是五种啊 = =OG 数学p547 为什么我怎么数都是五种啊 = = In the certain game,each token has one of three possible values：1 point,5 point,or 10 point.How many different combinations these token values are worth a total of 17 points?
问题描述：
SAT OG 数学p547 为什么我怎么数都是五种啊 = =
OG 数学p547 为什么我怎么数都是五种啊 = = In the certain game,each token has one of three possible values：1 point,5 point,or 10 point.How many different combinations these token values are worth a total of 17 points?
答
10+5+1+1
10+7*1
5+5+5+1+1
5+5+7*1
5+12*1
17*1
这种题要安顺序来枚举。 先从10points最多到没有10points， 再依次5points， 1points的。
答
是六种吗
1. 17个1point
2. 12个1point+1个5point
3. 2个5point+7个1point
4. 3个5point+2个1point
5. 7个1point+1个10point
6. 2个1point+1个5point+1个10point