Question
There are 3 girls and 6 boys.
The average height of the 3 girls is 133 cm.
The average height of 6 boys is 163 cm.
What is the average height of all the children?
2 m

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There are 3 girls and 6 boys.
The average height of the 3 girls is 133 cm.
The average height of 6 boys is 163 cm.
What is the average height of all the children?