Question

the average height of 4 children is 146cm.Another child who is 128cm tall joins the children.what is the averagre height of the 5 children now​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

Average height of the five children is 142.4 cm.

Explanation:

Given average height of 4 children is 146 cm.

So sum of their height is $(146 \times 4) = 584$cm.

Now one child who is 128 cm joined to their group.

Now their sum of their heights=$584 + 128 = 712$cm.

Now average height of the 5 children $= \frac{712}{5} = 142.4$cm.

This problem is solved by general rule of average.