How many possible binary search trees can be made with the keys 1, 2, 3?123456Submit

Question

How many possible binary search trees can be made with the keys 1, 2, 3?123456Submit
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Solution 1

The number of binary search trees that can be made with n distinct keys is given by the nth Catalan number. The formula for the nth Catalan number is:

Cn = (2n choose n) / (n + 1)

For n = 3, the number of possible binary search trees is:

C3 = (2*3 choose 3) / (3 + 1) = (6 choose 3) / 4 = 20 Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study prob

Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study problem.
Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study problem.
Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study problem.
Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solv

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