The mean weight of 60 students of a class is 52.75 kg. If mean weight of 25 students of this class is 51 kg, find the mean weight of remaining 35 students of the class.
Total weight of 60 students = 60 × 52.75 kg = 3165 kg Total weight of 25 students = 25 × 51 kg = 1275 kg ∴ Total weight of 35 students = (3165 – 1275) kg = 1890 kg ∴ Mean weight of 35 students = 1890/35 = 54 kg
