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The average weight of 48 students in a class is 30kg. If two new students come whose weight is 25, 35 kg then the what is the new average weight of the whole students?
1. 30
2. 32
3. 36
4. 38

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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.

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