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Question
State, if the following pair of a set, is disjoint:
{people living in Calcutta} and
{people living in West Bengal}.
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Solution
{people living in Calcutta} and {people living in West Bengal}.
These are not disjoint sets as people of Calcutta are the people of West Bengal as calcutta is a city of West Bengal. So, "people living in West Bengal" is a pair of disjoint sets.
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