Question

The mean height of 20 boys and 14 girls is 161 cm. If the mean height of the
14 girls is 151 cm, find the mean height of the 20 boys.​

Answer 1

Step-by-step explanation:

The total height of all the 34 children is 34×161=5474 (see how that works?)

Using the same logic, the total height of all the 14 girls is 14×151=2114

This means the total height of all the boys is 5474−2114=3360

Dividing by the total number of boys (20), we get 3360÷20=168

The mean height of all the boys is 168cm.

Hope my answer was helpful!

Answer 2

Step-by-step explanation:

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