Which of the following pair of sets are equal sets?
$P = \{a, b, c, d\}, Q = \{d, a, c, b\}$

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Solution

Two sets are said to be equal, if they contains exactly same element.
Given pair of set:
$P = \{a, b, c, d\}, Q = \{d, a, c, b\}$
As we know in set order of element does not matter.
Both sets $P = \{a, b, c, d\}$ and $Q = \{d, a, c, b\}$ contains exactly same number of elements.
Hence, the given pair of sets $P = \{a, b, c, d\}, Q = \{d, a, c, b\}$ are equal sets.

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