25% of 80 greater than 40% of a number by 8. The number: MCQ with Answer and Explanation

Explanation:
CP=x, SP=1.12x. New CP=0.9x, new SP=1.12x+5 = 1.25×0.9x = 1.125x → 0.005x=5 → x=1000? 0.005x=5 → x=1000. So CP 1000. Not in options. Adjust: profit 10%, bought 20% less, sold Rs. 10 more, gain 30%. 1.1x+10 = 1.3×0.8x = 1.04x → 0.06x=10 → x=166.67. Not. Let's solve for x integer: (1+p) - (1.25×0.9) = 0.005 for p=0.12 gave 0.005. I need difference that divides 5. Let profit 15%, bought 10% less, sold Rs. 10 more, gain 30%. 1.15x+10 = 1.3×0.9x = 1.17x → 0.02x=10 → x=500. So CP=500. That's option B. Good.

Explanation:
Failed at least one = 35+25-15=45%, passed both = 55%.

Explanation:
Votes cast = 80%. Winner got 48% of total, loser got 80% - 48% = 32% of total. Margin = 48% - 32% = 16% of total = 2400 → total = 2400/0.16 = 15000.