Beads

How many ways can we thread 4 red, 5 blue and 6 yellow beads on the thread?

Result

n =  630630

Solution:

n=(4+5+6)!4!⋅ 5!⋅ 6!=630630n = \dfrac{ (4+5+6)! }{ 4! \cdot \ 5! \cdot \ 6! } = 630630

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