Multiple choice

What is the value of the expression '1 2 3 + * 3 2 1 - + *'?

  1. 0

  2. 20

  3. 10

  4. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The expression '1 2 3 + * 3 2 1 - + *' is in postfix notation. Evaluating it: (1 * (2 + 3)) * (3 + (2 - 1)) = 5 * 4 = 20.