Question : Study the given table and answer the question that follows.
The average number of children per family is :
Option 1: 1.47
Option 2: 1.59
Option 3: 1.23
Option 4: 1.72
Correct Answer: 1.59
Solution : Average number of children per family $=\frac{\sum{\text{Number of children}\times\text{Number of families}}}{\sum{\text{Total number of families}}}$ $=\frac{0\times4+1\times22+2\times15+3\times6+4\times2}{4+22+15+6+2}$ $=\frac{22+30+18+8}{49}$ $=\frac{78}{49}$ $=1.59$ Hence, the correct answer is 1.59.
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