1.

The mean weight of a class of 20 student is 48 kg two more weighing 60kg and 58 kg respectively join the class what is the mean weight of class now

Answer»

Answer:

mean WEIGHT = TOTAL weight/total no. of students

Or, 48 = total weight/20

Or, total weight = 48×20

= 960 kg

New total weight = 960+60+58

= 1078kg

New total no. if students = 20+2 = 22

mean = 1078/22

= 49 kg

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