Question

the mean weight of a class of 20 student is 48kg . Two more student wighing 60 kg and 58kg respectively join the class. what is the mean weight of the class now​

Answer 1

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

Answer 2

Step-by-step explanation:

48×20=960

960+58+60=1078

1078/22=49