X can take the value
3 when any one of the families f1, f3, f7 is selected Similarly,
X = 4,  when family f2, f6 or f9 is selected,
X = 5,  when family f5 or f10 is selected
and
X = 6, when family f8  is selected © NCERT
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MATHEMATICS
Since we had assumed that each family is equally likely to be selected, the probability
that family f4 is selected is 1
10 Thus, the probability that X can take the value 2 is 1
10