Question

The average weight of 40 student of a class is 36.2kg.when three more students with weight 42.3kg,39.7kg,39.5kg

Answer 1

Total no. of students for 36.2 kg = 40
Total no. of students extra added = 3
Total weight of extra 3 students = 42.3+39.7+39.5 kg
=121.5 kg
Total no. of students including extra students = 40+3=43
Total average weight of students including extra weight = 36.2+121.5 = 157.7 kg
Total average = 157.7/43
= 3.66 kg approx