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The average weight of 25 students of a class is 28 kg. When 10 new students are admitted, the average increases by 2 kg. Find the average weight of the new students.
AnswerClick to flip back
A
35 kg
💡 Explanation:
Original number of students (N) = 25
Original average weight (A) = 28 kg
Number of new students (n) = 10
Difference between the average weights (d) = 2 kg
Now, apply this shortcut formula:
Average weight of new students = A + (N/n + 1)d
= 28 + (25/10 + 1)2
= 35 kg
So, the average weight of 10 new students is 35 kg.