Correct Answer - Option 1 : 76 kg
Given
Average weight of 25 Students of a class is 50 kg. If the weight of the class teacher is included, the average is increased by 1 kg.
Concept used
Average
Calculation
Average weight of 25 students of a class is 50 kg
Sum = 25 × 50 = 1250
If the weight of the teacher is added then the average increases by 1 kg.
⇒ 26 × 51 = 1326
Weight of the teacher
⇒ 1326 - 1250
⇒ 76 kg
