The average weight of 30 students is 60 kg. If one student is removed, the average drops to 59.5 kg. What is the weight of the removed student?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 74.5 kg.
Total weight of 30 students = 30 × 60 = 1800 kg
Total weight of 29 students = 29 × 59.5 = 1725.5 kg
Weight of removed student = 1800 – 1725.5 = 74.5 kg