https://file.aiquickdraw.com/mathbot/file/17302694666528qj69i8n.jpg

To solve this problem, let's go through it step-by-step.

### Step 1: Determine the Cost Price for Notebooks and Pens
- **Notebooks:** The shopkeeper bought 12 notebooks at Rs.200 per dozen. So,
  \[
  \text{Total Cost Price of Notebooks} = 200 \text{ Rs}
  \]
  
- **Pens:** The shopkeeper bought 24 pens at Rs.220 per dozen. Since 24 pens is equivalent to 2 dozen,
  \[
  \text{Total Cost Price of Pens} = 220 \times 2 = 440 \text{ Rs}
  \]

### Step 2: Calculate the Selling Price for Notebooks and Pens Including Profit
1. **Notebooks:** The notebooks are sold at a 10% profit.
   \[
   \text{Selling Price of Notebooks} = 200 + (10\% \text{ of } 200)
   \]
   \[
   = 200 + \left( \frac{10}{100} \times 200 \right)
   \]
   \[
   = 200 + 20 = 220 \text{ Rs}
   \]

2. **Pens:** The pens are sold at a 20% profit.
   \[
   \text{Selling Price of Pens} = 440 + (20\% \text{ of } 440)
   \]
   \[
   = 440 + \left( \frac{20}{100} \times 440 \right)
   \]
   \[
   = 440 + 88 = 528 \text{ Rs}
   \]

### Step 3: Calculate the Combined Selling Price
\[
\text{Combined Selling Price} = 220 + 528 = 748 \text{ Rs}
\]

### Answer:
The combined selling price of both notebooks and pens is **Rs.748**.

---

Would you like further details or have any questions?

### Related Questions:
1. How would the combined selling price change if the profit percentage on pens was 15% instead of 20%?
2. What would the combined selling price be if the notebooks were sold at a loss of 5%?
3. If the cost price of pens was increased by 10%, how would the selling price change?
4. How much profit would the shopkeeper make if both items were sold without any profit margin?
5. What would be the new combined selling price if 10 more notebooks were purchased and sold with the same profit?

### Tip:
When calculating percentage profit or loss, always apply it to the cost price.

A shopkeeper bought 12 notebooks at Rs.200 per dozen and 24 pens at Rs.220 per dozen. Then sells notebooks at 10% profit per dozen and pens at 20% profit per dozen. What is the combined selling price of both?

Learn how to calculate the combined selling price of notebooks and pens purchased by a shopkeeper with a 10% profit on notebooks and a 20% profit on pens. This problem uses basic percentage and profit formulas, ideal for Grades 7-9.

Math Problem Statement

Solution

Ask a new question for Free

By Image

Math Problem Analysis

Mathematical Concepts

Formulas

Theorems

Suitable Grade Level

Related Recommendation