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Growing Families

Age 14 to 16 Short Challenge Level:

The table shows some information about family sizes.

Number of children 1 2 3 4 5
Number of families 6 13 9 4 1


a) the mean number of children in a family

b) the mean number of siblings that each child has

If you liked this problem, you might also like the longer problem it is based on, The Wrong Stats
You can find more short problems, arranged by curriculum topic, in our short problems collection.