Q103
The average weight of 45 students in a class is 52 kg. Five of them whose average weight is 48 kg leave the class and other 5 students whose average weight is 54 kg join the class. What is the new average weight (in kg) of the class?
A.
B.
C.
Answer
D.
None of these
Answer: Option C
Solution
Answer: Option C
Solution:
Sum of the weights of the students after replacement = [(52 × 45) - (48 × 5) + (54 × 5)] kg
= 2370 kg
∴ New average
= kg
= kg