In a survey conducted recently with 100 families, the number of children in each family was recorded and tabulated as shown below:
Number of children
Families
0
40
1
30
2
40
How many families have atleast one child?
A
50
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B
30
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C
70
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D
80
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Solution
The correct option is C 70 We need to find the number of families with atleast one child,i.e, Number of families with 1 child or 2 children. We can see that, The number of families with 1 child = 30 The number of families with 2 children = 40 Therefore, 70 families have atleast one child.
(This is an example of empirical probability because an actual observation was carried out by collecting data through a survey. The survey to find the number of children in each family is the experiment and the data given in the table represents the outcomes.)