Question

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.​

Answer 1

Answer: 1.48 m.

Step-by-step explanation:

There are 32 - 14 = 18 girls in the class.

The Total height of the whole class = 1.515 * 32

= 48.48 m..

Total height of all the boys = 14 * 1.56 =  21.84 m.

So the total height of the 18 girls = 48.48 - 21.84

= 26.64 m.

Therefore the mean height of the girls

= 26.64 / 18

= 1.48 m.

Answer 2

Answer:

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