Question

The average weights of 30 Students in a
class is 60 kg. If two new students with
difference of their weights equal to 40 kg
replace an existing student, then the average weight of all the students now in the class is still 60 kg. Find the weight of heavier student who joined the class.​

Answer 1

Step-by-step explanation:

Let there be n students in the class.

60n+64(8)=62(n+8)

62n−60n=64(8)−62(8)

2n=16

n=8