Correct Answer - Option 4 : 110 kg
Given:
The average weight of 48 students of a class is 36 kg
Formula used:
Sum of the weight of students = Average × Total number of students
Calculation:
Sum of the weights of 48 students = 48 × 36 = 1728
When we included the Principal and the Teacher, the average becomes 36.76 kg
And, the total number of student and teachers becomes 50.
So, The total new weight becomes = 36.76 × 50 = 1838
Sum of the weight of the principal and the teacher = new weight – initial weight
⇒ 1838 – 1728
⇒ 110 kg
∴ The sum of the weight of the teacher and the principal is 110 kg.
