Question
There are 6 girls and 3 boys.
The average height of the 6 girls is 144 cm.
The average height of 3 boys is 129 cm.
What is the average height of all the children?
2 m

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There are 6 girls and 3 boys.
The average height of the 6 girls is 144 cm.
The average height of 3 boys is 129 cm.
What is the average height of all the children?