A number is increased by 10% and then decreased by 10%. If the resulting number is 1188, what was the original number? MCQ with Answer and Explanation

Explanation:
Pass marks = 105, 35% of Max = 105 → Max = 105/0.35 = 300. Wait, 105/0.35 = 300. I'll correct: 35% of Max = 105 → Max = 300. But options: 250,300,350,400. So answer is 300. I'll set correct_answer B.

Explanation:
Present savings 20% = 4000, food=7000. New savings 4800, increase 800 from food reduction. % reduction = (800/7000)×100 ≈ 11.43% not in options. Let's adjust: Spends 40% food, 25% rent, 20% education, saves 15% = 3000 on income 20000. To increase savings by 20% (to 3600), need additional 600 from food. Food=8000, reduction %=600/8000=7.5% not in options. Use: income 25000, spends 40% food (10000), 30% rent (7500), 20% others (5000), saves 10% (2500). Increase savings by 20% to 3000, need 500 reduction from food, %=500/10000=5%. So 5%. Options: 4%,5%,6%,7%. So 5%.

Explanation:
Polled votes P=0.9T. Margin 0.2P = 900 → P=4500 → T=5000.