Correct Answer: 43
Subject: 2025
Explanation: <b>Key Fact</b><br>Weighted mean = Σ(wx)/Σw = 43.<br><br><b>Additional Info</b><br>Topic: Average. The correct option is <b>D</b> — 43.<br><br><b>Why the other options are wrong</b><br><b>Option A</b>: 44 — not the option marked correct for this question.<br><b>Option B</b>: 42 — not the option marked correct for this question.<br><b>Option C</b>: 45 — not the option marked correct for this question.<br><br><b>Exam Trick</b><br>Identify the exact concept tested, then eliminate options that contradict the definition, formula, chronology or fact in the question.<br><br><b>Final Answer</b><br>Option D — 43.