Certainly! Let's solve this problem step-by-step.
We are given the following information:
- The total cost of 3 pens and a notebook is ₹72.
- The cost of the notebook is ₹18.
We need to find the cost of one pen.
Step 1: Determine the total cost of the pens.
First, subtract the cost of the notebook from the total cost:
[tex]\[ \text{Total cost of 3 pens} = \text{Total cost} - \text{Cost of the notebook} \][/tex]
[tex]\[ \text{Total cost of 3 pens} = ₹72 - ₹18 \][/tex]
[tex]\[ \text{Total cost of 3 pens} = ₹54 \][/tex]
Step 2: Calculate the cost of one pen.
Since we know that the total cost of 3 pens is ₹54, we can find the cost of one pen by dividing the total cost of the pens by the number of pens:
[tex]\[ \text{Cost of one pen} = \frac{\text{Total cost of 3 pens}}{3} \][/tex]
[tex]\[ \text{Cost of one pen} = \frac{₹54}{3} \][/tex]
[tex]\[ \text{Cost of one pen} = ₹18 \][/tex]
Therefore, the cost of one pen is ₹18.
