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Question on II-A homework

 
 
YangBober的头像
Question on II-A homework
YangBober - 2021年01月16日 Saturday 09:20
 

What does 5.14 mean?

It says "A word is any sequence of six letters, some pair of which are the same"

What does "some pair of which are the same" mean?


THanks

 
LensmireJohn的头像
Re: Question on II-A homework
LensmireJohn - 2021年01月16日 Saturday 14:13
 

Hi Bober. This just means that at least two of the letters are the same.

For example, if the letters available are A, B, C, D, E, and F, something like ABCABC or ABCDEE would both be examples that we'd want.