Correct Answer - Option 1 : 30
Given:
The average weight of 48 students in a class = 30 kg
The weight of 2 new students is 25 kg and 35 kg
Formula Used:
Average = Sum of observations/Number of observations
Calculation:
Sum of weights of 48 student = 48 × 30 = 1440 kg
Sum of weight of two new students = 25 + 35 = 60 kg
⇒ Total weight of the whole students = 1440 + 60 = 1500
So, the new average weight of the students = sum of the weight all students/ Total number of the students
⇒ 1500/50 = 30
∴ The new average weight of the students is 30.