find the number of ways ...

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2 white, 3 black and 4 grey marbles are shared equally among 9 students. Find the number of ways the marbles can be distributed so that Bran and Sansa gets the same colour and Arya gets a grey marble.
 

Hello. Can you share what you've thought about so far? Tutors would like to see any work you've tried. If you're not able to begin, please let us know what you've already learned about counting problems. Thank you!

:)
 
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