Question

Sarita bought 80 chocolates for the 40 students of her class. She then remembered that she had to buy chocolates in the same ratio for 20 of her teachers as well. How many more chocolates should she buy?

• A. 40
• B. 20
• C. 80
• D. 60

Answer 1

The correct option is A 40

Sarita bought 80 chocolates for 40 students. Since the ratio used is the same, we can use direct proportion to find the number of chocolates she bought for her teachers.
Using the formula for direct proportion,
$\frac{\text{Number of chocolates for students}}{Numberofstudents}=\frac{\text{Number of chocolates for teachers}}{Numberofteachers}$
$\Rightarrow \frac{80}{40}=\frac{\text{Number of chocolates for teachers}}{20}$
$\therefore$ Number of chocolates bought for her teachers =$2\times 20=40$.