sagasdje
幼苗
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∵全部结果一共5*5*5种,就是125种
等于9的有513(6种),522(3种),441(3种),432(6种),333(1种)
∴
详细点就是
111.112.113.114.115.121.122.123.124.125.131.132.133.134.135.141.142.143.144.145.151.152.153.154.155为一组.共5列5行.所以25种.如此类推.还会有多5种这样的,即2*5*5.
然后算出相加为9的数字有.513(6种),522(3种),441(3种),432(6种),333(1种)因为可以重复所以有多种.
结果就是(6+3+3+6+1)/125
打的挺辛苦的,
1年前
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