There are 50 students in a class. If the average weight of 39 students is 32 kg and the average weight of the entire class is 34 kg, then what is the average weight (in kg) of rest of the 11 students of the class? (Correct up to two decimal places)
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 41.09.
Total weight of 39 students = 39 × 32 = 1248
Total weight of 50 students = 50 × 34 = 1700
Weight of remaining 11 students = 1700 - 1248 = 452
Average weight of 11 students = 452 ÷ 11 = 41.09