A binary tree with 20 nodes has how many null branches? by Anuj Verma · Published 21/12/2018 · Updated 21/12/2018 It is 21. Let us take a tree with 5 nodes (n=5) It will have only 6 (ie,5+1) null branches. In general, A binary tree with n nodes has exactly n+1 null nodes. Share
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