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ISRO | ISRO CS 2017 | Question 28

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  • Last Updated : 16 Mar, 2018

The number of structurally different possible binary trees with 4 nodes is
(A) 14
(B) 12
(C) 336
(D) 168


Answer: (A)

Explanation: The total number of structurally different possible binary trees can be found out using the Catalon number which is (2n)!/ (n! *(n+1)!).
Here n=4, so, answer is 14.

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