I am attempting to solve this combinatorics question whilst applying what has been learnt in ordinary generating functions.
and this is my attempt so far...
1) Am I correct so far? 2) If yes, how should I proceed?
Thanks in advance.
I am attempting to solve this combinatorics question whilst applying what has been learnt in ordinary generating functions.
and this is my attempt so far...
1) Am I correct so far? 2) If yes, how should I proceed?
Thanks in advance.
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