Question

A class has 24 students. The average weight of 16 students is 50.25 kg and that of the remaining students is 45.15 kg. What is the average weight of the students in the class?

Answer 1

total number of students in class = 24

Average of 16 student = 56.25

total weight = 16*56.25

Average of 9 students = 45.15

total weight = 9*45.15

average of 24 students = (16*56.25 + 45.15*9)/24

= (900+406.5)/24= 443.85