किसी परीक्षा में, A ने B से 20 अंक अधिक प्राप्त किए हैं । यदि B ने A से 5% कम अंक प्राप्त किए हों, तो B ने कितने अंक प्राप्त किए हैं ?
Read this question in English
In an examination, A has scored 20 marks more than B. If B has scored 5% less marks than A, how much has B scored?
(a) 360 · (b) 380 · (c) 400 · (d) 420
उत्तर और व्याख्या · explanation in English
Answer: (b) 380
B's shortfall of 5% is measured on A's marks and equals the 20-mark gap, so A has 400 and B 380.
- B = A − 20, and B = 95% of A.
- So 5% of A = 20, giving A = 400.
- B = 400 − 20 = 380.
- Check: 95% of 400 = 380.
Remember · When a percentage gap equals a known difference, that difference is the percentage of the base.
Question and answer: UPSC's official GS Paper II (2019, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 30 Sept 2026 (how we verify). ·