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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Solution

Mean Weight=48 out of 20 students

Therefore total weight = 20 × 48 = 960

Add two students weighing 60, 58 to 960 = 960+60+58 = 1078

Therefore, Mean = $\frac{1078}{22}$
= 49Kg

So new mean weight of class is 49 Kg

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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?

Mean Weight=48 out of 20 students Therefore total weight = 20 × 48 = 960 Add two students weighing 60, 58 to 960 = 960+60+58 = 1078 Therefore, Mean = 107822 = 49Kg So new mean weight of class is 49 Kg

Mean Weight=48 out of 20 students

Therefore total weight = 20 × 48 = 960

Add two students weighing 60, 58 to 960 = 960+60+58 = 1078

Therefore, Mean = $\frac{1078}{22}$
= 49Kg

So new mean weight of class is 49 Kg