Question

In a complete binary tree or perfect binary tree, every inner node has exactly two children. If there are 21 leaf nodes or exterior nodes in the tree, how many internal nodes are there in the perfect binary tree? A. 19 B. 20 C. 22 D. 18 

    In a complete binary tree or perfect binary tree, every inner node has exactly two children. If there are 21 leaf nodes or exterior nodes in the tree, how many internal nodes are there in the perfect binary tree?
A. 19
B. 20
C. 22
D. 18
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Data Structures Using C
Data Structures Using C
Amol M. Jagtap, Ajit… 1st Edition
Chapter 5, Problem 2 ↓

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In a perfect binary tree, every internal node has exactly 2 children, and all leaf nodes are at the same level.  Show more…

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In a complete binary tree or perfect binary tree, every inner node has exactly two children. If there are 21 leaf nodes or exterior nodes in the tree, how many internal nodes are there in the perfect binary tree? A. 19 B. 20 C. 22 D. 18
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