Question

The average weight of a class dropped from 65 kg to 62 kg when a student weighing 77 kg is absent today. How many students are there in the class today? l

Answer 1

Answer:

hi I hope it will help you

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

Therefore, initially there were 8 students in the class.

Answer 2

Answer:

4

Step-by-step explanation:

let's say n no.if students are there so ,Avg is 65 so total 65*n, a student weight 77kg absent and the new avg is 62 so , (65*n-77)/(n-1)=62 (n-1 as 1 student absent) so n from here is coming 5