Correct Answer: 1/5
Subject: 2025
Explanation: <b>Key Fact</b><br>A three-digit number is divisible by 5 when its last digit is 0 or 5; the marked probability is 1/5.<br><br><b>Additional Info</b><br>Topic: Probability. The correct option is <b>A</b> — 1/5.<br><br><b>Why the other options are wrong</b><br><b>Option B</b>: 2/5 — not the option marked correct for this question.<br><b>Option C</b>: 3/5 — not the option marked correct for this question.<br><b>Option D</b>: 1/2 — 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 A — 1/5.