Use expected value calculation method to find the


Use expected value calculation method to find the following:

In a European country, 20.0% of the families have 3.0 children, 40.0% have 2.0 children, 30.0% have 1.0 child, and 10.0% have 0.0 children. On average, how many children are there to a family?   

Enter answer as a number rounded to the nearest tenth (one place after decimal).   Examples of correctly entered responses: 

3.4    0.0    10.0    77.5    100.0

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Mathematics: Use expected value calculation method to find the
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