簡(jiǎn)單來(lái)說(shuō)就是從abc三個(gè)組里面一樣拿一個(gè),問(wèn)有多少種方法.
7x3x9=189
SAT數(shù)學(xué)題排列組合題求解答
SAT數(shù)學(xué)題排列組合題求解答
A={A,B,C,D,E,F,G}
B={0,1,2}
C={1,2,3,4,5,6,7,8,9}
The filing system in an office requires each file to have an alphanumeric code name of the form abc.A,B and C are the sets from which a,b,and c must be chosen.How many possible code names are there?
A={A,B,C,D,E,F,G}
B={0,1,2}
C={1,2,3,4,5,6,7,8,9}
The filing system in an office requires each file to have an alphanumeric code name of the form abc.A,B and C are the sets from which a,b,and c must be chosen.How many possible code names are there?
英語(yǔ)人氣：828 ℃時(shí)間：2020-09-04 19:08:09
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