The average weight of 75 students in a class is 20 kg. The average weight of…
2025
The average weight of 75 students in a class is 20 kg. The average weight of boys and girls is 22 kg and X kg, respectively. If the ratio of boys and girls in the class is 2:1, respectively, then find X?
- A.
16
- B.
24
- C.
48
- D.
8
- E.
32
Attempted by 18 students.
Show answer & explanation
Correct answer: A
There are 50 boys and 25 girls. Total class weight = 75 x 20 = 1500 kg. Boys' total weight = 50 x 22 = 1100 kg, so girls' total weight = 400 kg. Girls' average X = 400/25 = 16 kg.