Question

The average of some students in a class is 43kg when 4new students are included the average weight become 42.5kg if the weight of these 4 new students are 42,36.5,39,42.5kg the total no of student is

Answer 1

Answer:

students = x

Av=43

Total: 43x

Total after new students = 43x+16o

Total students = x +4

(43x+160)/x+4=42.5

43x+I60=(x+4) 42.5

43x+160=42.5x+17O

0.5x=10

x=20

x +4=24