Question

Amar goes to a shop to buy some chocolates. The shopkeeper informs him that 4 chocolates would cost ₹60. Can you find the cost of 7 chocolates with the help of the unitary method?

• A. $₹90$
• B. $₹75$
• C. $₹15$
• D. $₹105$

Answer 1

The correct option is D $₹105$

Find the cost of 1 chocolate:
$\text{Cost of 1 chocolate =}\frac{\text{Total cost of chocolates}}{\text{Total number of chocolates}}=\frac{60}{4}=₹15$

Now, we will find the cost of 7 chocolates.
Cost of 7 chocolates = Cost of 1 chocolate × Number of chocolates
$=₹15\times 7=₹105$