The mean weight of a class of 20 students is 52 kg. Two more students weighing 61kg and 57kg respectively join the class. What is the mean weight of the class now

1 answer

First, we calculate the total weight of the original 20 students:

Total weight = 52 kg/student * 20 students = 1040 kg

Now, we add the weight of the two new students:

New total weight = 1040 kg + 61 kg + 57 kg = 1158 kg

Finally, we calculate the new mean weight:

Mean weight = Total weight / Total number of students
Mean weight = 1158 kg / 22 students
Mean weight ≈ 52.636 kg

Therefore, the mean weight of the class now is approximately 52.636 kg.