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

1.48 m.

Step-by-step explanation:

The number of girls in the class = 32 - 14 = 18 girls.

Sum of the boy's heights = 14 * 1.56 = 21.84 m.

Sum of all the student's heights = 32 * 1.515 = 48.48 m.

So the sum of the heights of the girls is 48.48 - 21.84

= 26.64 m.

So the mean height of the girls 26.64 / 18

= 1.48 m.

typically if you want , you would actually put questions here for us to you. but hey, that's just me. maybe someone will magically answer the questions for you without knowing what they are.

b, i believe, but not sure.