How many leaf nodes can a full binary tree with n internal nodes have?

Practice Questions

Q1
How many leaf nodes can a full binary tree with n internal nodes have?
  1. n + 1
  2. n
  3. 2n
  4. n/2

Questions & Step-by-Step Solutions

How many leaf nodes can a full binary tree with n internal nodes have?
  • Step 1: Understand what a full binary tree is. A full binary tree is a type of tree where every internal node has exactly two children.
  • Step 2: Identify what internal nodes are. Internal nodes are the nodes that have children, while leaf nodes are the nodes that do not have any children.
  • Step 3: Recognize that in a full binary tree, each internal node contributes to the creation of leaf nodes. Specifically, each internal node has 2 children.
  • Step 4: Count the total number of nodes in a full binary tree. If there are n internal nodes, then the total number of nodes (internal + leaf) can be calculated.
  • Step 5: Use the formula for a full binary tree. The relationship between internal nodes (n) and leaf nodes (L) is given by the formula: L = n + 1.
  • Step 6: Conclude that if there are n internal nodes in a full binary tree, then there will be n + 1 leaf nodes.
  • Full Binary Tree – A full binary tree is a type of binary tree in which every node other than the leaves has two children.
  • Internal Nodes vs Leaf Nodes – Internal nodes are nodes that have at least one child, while leaf nodes are nodes that do not have any children.
  • Relationship Between Internal and Leaf Nodes – In a full binary tree, the number of leaf nodes is always one more than the number of internal nodes.
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