Question

In a class of 32 students

the mean height of the 14 boys is 1.56 meters
the mean height of all 32 students is 1.515

work out the mean height of the girls

Answer 1

14(1.56) + 18h = 32(1.515)

21.84 + 18h = 48.48

18h = 26.64

h = 1.48 meters

The mean height of the girls is 1.48 meters.