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      Question

      In a binary tree, if the number of leaf nodes is L, what

      is the number of nodes with two children?
      A L Correct Answer Incorrect Answer
      B LтАУ1 Correct Answer Incorrect Answer
      C 2L Correct Answer Incorrect Answer
      D L+1 Correct Answer Incorrect Answer
      E Cannot be determined Correct Answer Incorrect Answer

      Solution

      For a non-empty binary tree, nodes with two children = leaf nodes тАУ 1 (property of full binary trees).

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