Ans: Option CExplanation:
- Profit = SP - CP = 600 - 500 = 100.
- Profit% = (Profit / CP) × 100% = (100 / 500) × 100% = 20%.
Ans: Option DExplanation:
- Required SP to make 20% profit on CP = 400 is SP = 1.20 × 400 = 480.
- Given SP is after 10% discount on marked price M, so 0.90 × M = 480.
- Therefore M = 480 ÷ 0.90 = 533.333... = $533 + 1/3.
- This exact value does not match any listed option. Nearest listed option is D: $540.
Ans: Option CExplanation:
- SP = 255 and SP = (100 - 15)% of CP = 85% of CP = 0.85 × CP.
- Thus 0.85 × CP = 255.
- CP = 255 ÷ 0.85 = 300.
Ans: Option DExplanation:
- Let the two articles have cost prices CP1 and CP2 and both are sold at SP = 2000.
- For the first: SP = 2000 and gain 25% ⇒ CP1 = SP ÷ 1.25 = 2000 ÷ 1.25 = 1600.
- For the second: SP = 2000 and loss 25% ⇒ CP2 = SP ÷ 0.75 = 2000 ÷ 0.75 = 2666.666... = 8000/3.
- Total CP = 1600 + 2666.666... = 4266.666... Total SP = 2000 + 2000 = 4000.
- Net loss = Total CP - Total SP = 4266.666... - 4000 = 266.666...
- Loss% = (266.666... / 4266.666...) × 100% = (266 2/3 ÷ 4266 2/3) ×100% = 6.25% loss.
- Alternate short derivation: For equal SPs, convert to CPs as above to compute overall loss precisely.
Ans: Option CExplanation:
- Let CP per pen = c and SP per pen = s.
- Given: CP of 12 pens = SP of 10 pens ⇒ 12c = 10s.
- Therefore s = (12/10) c = 1.2 c.
- Profit% = ((s - c) / c) × 100% = (0.2 c / c) × 100% = 20%.
Ans: Option CExplanation:
- Total quantity = 50 + 50 = 100 kg.
- Total cost = 50 × 40 + 50 × 50 = 2000 + 2500 = 4500.
- Average (effective) CP per kg = 4500 ÷ 100 = 45 per kg.
- SP per kg = 48 per kg.
- Profit per kg = 48 - 45 = 3.
- Profit% = (3 / 45) × 100% = (1 / 15) × 100% = 100/15% = 20/3% = 6.666...% ≈ 6.67%.
Ans: Option CExplanation:
- Let CP = x.
- SP at 10% profit: SP1 = 1.10 x.
- SP at 20% profit (if sold for $10 more): SP2 = 1.20 x = SP1 + 10 = 1.10 x + 10.
- So 1.20 x - 1.10 x = 10 ⇒ 0.10 x = 10 ⇒ x = 100.
Ans: Option AExplanation:
- Let CP = 100 (for ease of calculation).
- Then MP = CP × 1.40 = 140.
- Seller gives 10% discount: SP = 0.90 × MP = 0.90 × 140 = 126.
- Profit = SP - CP = 126 - 100 = 26.
- Profit% = (26 / 100) × 100% = 26%.
Ans: Option CExplanation:
- SP = 2000 and SP = 1.25 × CP.
- Thus CP = SP ÷ 1.25 = 2000 ÷ 1.25 = 1600.
Ans: Option CExplanation:
- Total cost price = purchase price + repair = 2000 + 200 = 2200.
- SP = 2640.
- Profit = SP - Total CP = 2640 - 2200 = 440.
- Profit% = (440 / 2200) × 100% = 20%.
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