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In a sample of 100 families, the number of children in each family is tabulated below:...

In a sample of 100 families, the number of children in each family is tabulated below:

Number of Children Frequency
1 30
2 50
3 10
4 10
Total 100

Question: For each child, find the mean number of siblings. (A sibling is a brother or a sister. E.g. each child in a 5-child family would have 4 siblings.)?

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