Soma bought a dozen notebooks at Rs 180. If Arun wants to buy 25 such notebooks,
how much money should he carry with him ?

Answer

To solve the problem step by step, we will calculate the cost of one notebook and then find out how much Arun needs to buy 25 notebooks.

### Step 1: Understand the Cost of a Dozen Notebooks
Soma bought a dozen notebooks for Rs. 180.
- One dozen means 12 notebooks.

### Step 2: Calculate the Cost of One Notebook
To find the cost of one notebook, we divide the total cost by the number of notebooks in a dozen:
\[ \text{Cost of one notebook} = \frac{\text{Total cost}}{\text{Number of notebooks}} = \frac{180}{12} \]
Calculating this gives:
\[ \text{Cost of one notebook} = 15 \text{ Rs.} \]

### Step 3: Calculate the Cost of 25 Notebooks
Now, we need to find out how much Arun needs to carry for 25 notebooks. We multiply the cost of one notebook by the number of notebooks Arun wants to buy:
\[ \text{Cost for 25 notebooks} = \text{Cost of one notebook} \times 25 = 15 \times 25 \]
Calculating this gives:
\[ \text{Cost for 25 notebooks} = 375 \text{ Rs.} \]

### Step 4: Conclusion
Therefore, Arun should carry Rs. 375 with him to buy 25 notebooks.

### Final Answer
Arun should carry Rs. 375.

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