The mean weight of a class of 20 students is 48 kg. Two more students weighing 60 kg and 58 kg respectively join the class. What is the mean weight of the class now
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Mean = Sum of all observations / Total no. of observation
Let the sum be 'x'
48 = x/20
x = 48 x 20 = 960
Sum of weight of 20 students = 960
22 students = 960 + 58 + 60
22 students = 1078
Mean = 1078/22 = 49
Mean weight of the class is 49 kg
Let the sum be 'x'
48 = x/20
x = 48 x 20 = 960
Sum of weight of 20 students = 960
22 students = 960 + 58 + 60
22 students = 1078
Mean = 1078/22 = 49
Mean weight of the class is 49 kg
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