Correct option is (-d) -18
Postfix expression given: 6 3 2 4 + - *
What the above expression can be represented as:
Bracket is not implied by given expression but I've used it to tell you how this expression will look like when converted to Infix express.
- 6 3 (2 + 4) - *
- 6 (3 - (2 + 4)) *
- 6 * (3 - (2 + 4))
Infix expression of given Postfix expression:
6 * (3 - (2 + 4))
6*(3 – 6)
6*(-3)
-18
Hence the Postfix expression evaluates to: (-18).
