+1 vote
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The answer is given as 14.I calculated using Catalan number but the answer did not come as 14.

asked | 33 views
answer is coming as 14, it is right. see apply the formula 2nCn/n+1*(n!) now you need to multiply by n!  also as objects are different so you need to take into account the permutation as each tree would be distinct when u interchange the objects position as each of them is distinct.

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