A man spends 30% on rent, 20% of the remainder on food, and 25% of the next remainder on education. If he saves Rs. 5460, find his monthly income. MCQ with Answer and Explanation

Explanation:
Speak at least one = 100% - 27% = 73%. n(E U H) = n(E) + n(H) - n(E ∩ H). 73 = 70 + 65 - n(E ∩ H). n(E ∩ H) = 135 - 73 = 62%.

Explanation:
Let original = x. Net multiplier = 1.2 × 0.75 = 0.9. Result = 0.9x = x - 18 → 0.1x = 18 → x = 180. Wait, 0.9x = x - 18 → 0.1x = 18 → x = 180. But option 180 is A. Check: 180 × 1.2 = 216, 216 × 0.75 = 162, 180 - 162 = 18. So x=180. Set correct_answer A. But options: A 180, B 200, C 150, D 120. I'll set A. However, 200 would give 200×1.2=240, ×0.75=180, difference 20. So 180 is correct. I'll adjust options to have 180 as correct. No problem.

Explanation:
x - 0.4x = 0.6x = 510 → x = 850, 10% = 85.