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The number of possible ordered trees with 3 nodes A,B,C is ??


 

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no, explanation wrong for sure

see joshi+nitish comment, u will get it
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Thanku ma'am...!
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ans is 30
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1 Answer

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Number of Labeled Tees = (Number of unlabeled trees) * n!
                       = [(2n)! / (n+1)!n!]  × n!

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