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GATE | Gate IT 2008 | Question 71

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  • Last Updated : 28 Jun, 2021
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How many distinct BSTs can be constructed with 3 distinct keys?
(A) 4
(B) 5
(C) 6
(D) 9


Answer: (B)

Explanation: 2nCn/(n+1) = 6C3/4 = 5

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