The average weight of 64 students is 48 kg and the average weight of another class of 32 students is 24 kg. Find the average weight of both classes combined.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 40 kg.
Total weight of first class = 64 × 48 = 3072 kg
Total weight of second class = 32 × 24 = 768 kg
Combined total weight = 3072 + 768 = 3840 kg
Total students = 64 + 32 = 96
Average weight = 3840 ÷ 96 = 40 kg