Which of the following pair of sets are equal sets?
$M = \{r, e, d\}$
$N = \{d, a, r\}$

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Solution

Two sets are said to be equal, if they contains exactly same element.
Given pair of set:
$M = \{r, e, d\}$ and $N = \{d, a, r\}$
As we know in set order of element does not matter.
Both sets $M = \{r, e, d\}$ and $N = \{d, a, r\}$ do not contains exactly same element. The element $\{e\}$ from set $M$ and element $\{a\}$ from set $N$ are different.
Hence, the given pair of sets $M = \{r, e, d\}$ and $N = \{d, a, r\}$ are not equal sets.

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