In a class of 32 students the mean height of 14 boys is 1.56 the mean height of all 32 students is 1.515 work out the mean height of the girls

Number of girls = 32 - 14 = 18

Total height of all the 32 students = 1.515 x 32 = 48.48

Total height of the 14 boys = 14 x 1.56 = 21.84

Total height of the 18 girls = 48.48 - 21.84 = 26.64

Mean height of the 18 girls = 16.84 ÷ 18 = 1.48

1.48

With a continuous thought process.