The total number of student in sections A and B of a class is 504. The ratio of the number of students in A and B is 7:5. The average weight of the students in section B is 20% more than that of the students in section A. If the average weight of all the students in the class in 52 kg. then what is the average weight of the students in section B?
a) 58.6
b) 53.6
c) 56.7
d) 57.6
Sol:
