Question

What is the postfix expression of $P + Q / R * (S - P)$?

• A. PQRSP/-*+
• B. +P/Q*R-SP
• C. PQRSP/-*+
• D. **-/PQRSP

Hint:

Postfix expressions evaluate left-to-right; write operands first, then operators.

Answer 1

The Correct Option is A

Given infix expression: \(P + \frac{Q}{R} \times (S - P)\)
First convert to postfix:
- \(Q / R \rightarrow QR/\)
- \(S - P \rightarrow SP-\)
- Then \(QR/ \times SP- \rightarrow QR/SP/-*\)
- Finally add P: \(P QR SP/- * +\)