The correct output of the expression '20 - 3 * 4 + 10 / 2' is 8. This is calculated by following the order of operations (PEMDAS/BODMAS):

  1. Multiplication and Division (from left to right):

    • 3 * 4 = 12
    • 10 / 2 = 5
  2. Addition and Subtraction (from left to right):

    • 20 - 12 = 8
    • 8 + 5 = 13

Therefore, the final answer is 13.

Order of Operations: Calculate 20 - 3 * 4 + 10 / 2

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