Introduction to Statistics / MAT300 SPRING 2014 Problem

Introduction to Statistics / MAT300 SPRING 2014 

1.Weighted mean: Tabular data

The table below summarizes the number of children per household for a  sample of   middle- income families.  
Number of households Number of children
2 4
13 2
10 3
12 6
What is the  mean number of children per household for these families? Round your answer to at least one decimal place.