CMA Foundation · Fundamentals of Business Mathematics and Statistics · Ratios, Variations and Proportions
A firm's monthly sales to purchases are in the ratio 7:5. If sales for a month are ₹4,90,000, what is the amount of purchases?
Purchases are ₹3,50,000. Sales represent 7 parts, so each part is ₹70,000. Purchases are 5 parts, which is ₹3,50,000. Multiplying sales by 7/5 would invert the ratio and wrongly give a higher purchase figure.
- A₹3,50,000Correct
- B₹3,43,000
- C₹6,86,000
- D₹4,20,000
Explanation
Sales are 7 parts, so one part = 4,90,000/7 = ₹70,000. Purchases are 5 parts = 5 × 70,000 = ₹3,50,000. Check: 4,90,000:3,50,000 = 7:5. Option ₹6,86,000 arises from multiplying sales by 7/5 (inverting the ratio).
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