Correct Answer - Option 1 : 96 kg
Given:
The average weight of 50 students = 45 kg
Weight of teacher is included then average becomes = 46 kg
Concept used:
Average = (Sum of observations)/(Number of observations)
Calculation:
Total weight of the students = 50 × 45 = 2250
Weight of teacher is included then average becomes = 46 kg
Total weight of the whole class with teacher = 51 × 46 = 2346
The weight of the teacher = 2346 – 2250 = 96 kg
∴ The weight of the teacher is 96 kg.
