Question : The following table shows the number of children in each house of a society.
What is the average number of children per house?
Option 1: 1.65
Option 2: 1.4
Option 3: 1.9
Option 4: 1.15
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Correct Answer: 1.4
Solution : According to the data given in the table: Total number of children = 0 × 7 + 1 × 7 + 2 × 13 + 3 × 3 = 42 Total number of houses = 7 + 7 + 13 + 3 = 30 So, the average number of children per house = $\frac{\text{Total number of children}}{\text{Total number of houses}}$ = $\frac{42}{30}$ = 1.4 Hence, the correct answer is 1.4.
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