There are two sections A and B of a class, consisting of 38 and 42 students, respectively. If the average weight of the students of section A is 55 kg and that of section B is 32 kg, find the average weight of all the students in the class.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 42.925 kg.
There are two sections A and B of a class, consisting of 38 and 42 students respectively.
The average weight of the students of section A is 55 Kg and that of section B is 32 Kg.
Total = Average × Number of entities
Total weight of all students in section A = 38 × 55 = 2090 kg
Total weight of all students in section B = 42 × 32 = 1344 kg
The total number of students in both sections together = 38 + 42 = 80
Now, the average weight of all the students in the class = (2090 + 1344)/80 = 3434/80 = 42.925 kg