The numbers of children in 10 families of a locality are:

$2, 4, 3, 4, 2, 3, 5, 1, 1, 5$

Find the mean number of children per family.

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answer is B.

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Detailed Solution

The given data shows the the numbers of children in 10 families of a locality are:

2, 4, 3, 4, 2, 3, 5, 1, 1, 5

We need to find the mean number of children per family.
The total number of observations is

10

.
We know that,

Mean = \frac{Sum of observations}{Number of observations}

\Rightarrow Mean = \frac{2 + 4 + 3 + 4 + 2 + 3 + 5 + 1 + 1 + 5}{10}

\Rightarrow Mean = \frac{30}{10}

\Rightarrow Mean = 3

Therefore, the mean number of children per family is 3.
Hence, the correct option is 2.

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