Question

The mean height of 60 boys and 40 girls is 160cm.if the average height of the boys is 165cm,the average height of the girls is

Answer 1

height of the girl is 124 cm

Answer 2

Let the sum of ages of all boys be x
And sum of all girls be y
(x+y)/100=160
x+y=16000
Also
x/60=165
x=9900
So y=16000-9900
=6100
Now average height of girls =6100/40
=152.5