Question : The following table shows the number of children in each house of a society.
| Number of Children | Number of Houses |
| 0 | 7 |
| 1 | 7 |
| 2 | 13 |
| 3 | 3 |
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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