Question

If the cost of three pens is ₹27, then what will be the cost of 7 pens?

Answer 1

Cost of 3 pens $=₹27$
Cost of 1 pen $=\frac{₹27}{3}=₹9$
Cost of 7 pens $=₹9\times 7=₹63$

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> ∴ The cost of $7$ pens is $₹63$.