- A₹360
- B₹350
- C₹400
- D₹370
Step-by-Step Solution
After 20% off: 500 − 100 = 400. After 10% off 400: 400 − 40 = ₹360. (Note: successive discounts are not simply added.)
Answer: A) ₹360
A shopkeeper offers successive discounts of 20% and then 10% on a marked price of ₹500. Find the final selling price.
Class 7Comparing QuantitiesComparing Quantities
Key idea: Reading the question carefully
Three things to check before you compute:
1. **What's being asked?** Profit % needs CP and SP. SI needs P, R, T.
2. **What units are the inputs in?** Time in months → convert to years (divide by 12). Rate already per annum → leave it.
3. **What's the base of the percentage?** Profit/loss % is on COST price, not selling price. Discount % is on MARKED price, not on what you actually paid.
1. **What's being asked?** Profit % needs CP and SP. SI needs P, R, T.
2. **What units are the inputs in?** Time in months → convert to years (divide by 12). Rate already per annum → leave it.
3. **What's the base of the percentage?** Profit/loss % is on COST price, not selling price. Discount % is on MARKED price, not on what you actually paid.
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