To solve the problem, we will break it down into two parts: Quantity I and Quantity II.
### Quantity I: Selling Price of the Bike
1. **Calculate the Selling Price of Mr. A:**
- The price of the bike = ₹28,000
- Discount given by Mr. A = 12%
- Selling Price (SP) of A = Price - Discount
- Discount = 12% of ₹28,000 = (12/100) * 28,000 = ₹3,360
- SP of A = ₹28,000 - ₹3,360 = ₹24,640
2. **Calculate the Selling Price of Mr. B:**
- Mr. B gives a discount of 12% on the first ₹20,000 and 8% on the remaining ₹8,000.
- Discount on the first ₹20,000 = 12% of ₹20,000 = (12/100) * 20,000 = ₹2,400
- Selling Price for the first ₹20,000 = ₹20,000 - ₹2,400 = ₹17,600
- Discount on the remaining ₹8,000 = 8% of ₹8,000 = (8/100) * 8,000 = ₹640
- Selling Price for the remaining ₹8,000 = ₹8,000 - ₹640 = ₹7,360
- Total Selling Price of B = ₹17,600 + ₹7,360 = ₹24,960
3. **Calculate the Difference in Selling Prices:**
- Difference = SP of A - SP of B = ₹24,640 - ₹24,960 = -₹320
- Since we are looking for the absolute difference, we take | -320 | = ₹320.
### Quantity II: Quantity of Rice Sold at 20% Loss
1. **Let the total quantity of rice = 600 kg.**
2. **Let X kg be the quantity sold at 15% profit.**
- Selling Price for X kg at 15% profit = X * (1 + 0.15) = 1.15X
3. **The remaining quantity sold at 20% loss:**
- Remaining quantity = 600 - X kg
- Selling Price for (600 - X) kg at 20% loss = (600 - X) * (1 - 0.20) = (600 - X) * 0.80 = 480 - 0.80X
4. **Total Cost Price of 600 kg of rice:**
- Assume cost price of 1 kg = ₹1, then total cost price = ₹600.
5. **Total Selling Price (SP) with a loss of 6%:**
- Loss of 6% on ₹600 = 600 * (1 - 0.06) = ₹564.
6. **Setting up the equation:**
- Total SP = SP from X kg + SP from (600 - X) kg
- 564 = 1.15X + (480 - 0.80X)
- 564 = 1.15X + 480 - 0.80X
- Combine like terms: 564 = 0.35X + 480
- 564 - 480 = 0.35X
- 84 = 0.35X
- X = 84 / 0.35 = 240 kg
7. **Quantity sold at 20% loss:**
- Quantity sold at 20% loss = 600 - X = 600 - 240 = 360 kg.
### Final Comparison
- Quantity I = ₹320
- Quantity II = 360 kg
Since ₹320 is less than 360 kg, we conclude:
**Answer:** Quantity I < Quantity II