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In a class of 25 students
the mean height of the 15 girls is 1.65 metres
the mean height of all 25 students is 1.682 metres.
Work out the mean height of the boys.

Respuesta :

If the mean height of 15 girls is 1.65m, the sum of the girls’ heights is 15×1.65=24.75m.

If the mean height of 10 boys is x metres, the sum of the boys’ heights is 10x m.

The sum of all 25 srudents’ heights is 25×1.682=42.05m.

Therefore, 24.75+10x=42.05, x=(42.05-24.75)/10=1.73m, the mean height of the boys.
shubhamchouhanvrVT

The mean height of the boys will be 1.73m.

What is mean?

Mean is defined as the ratio of the sum of the number of the data sets to the total number of the data.

Given that:-

  • In a class of 25 students, the mean height of the 15 girls is 1.65 meters the mean height of all 25 students is 1.682 meters.

If the mean height of 15 girls is 1.65m, the sum of the girls’ heights is 15×1.65 = 24.75m.

If the mean height of 10 boys is x meters, the sum of the boys’ heights is 10x m. The sum of all 25 students’ heights is

25×1.682=42.05m.

The mean height of the boys.

24.75+10x=42.05,

x =(42.05-24.75)/10

x =1.73m,

Therefore the mean height of the boys will be 1.73m.

To know more about mean follow

https://brainly.com/question/968894

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