If two given sets have the same cardinal number, they are called ____ sets.

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Solution

Sets having same cardinal number (number of elements) are called as Equivalent sets.
Cardinal number is the number of elements in a finite set.
If set $A = \{1, 2\}$ and set $B = \{a, b\}$ , the number of elements in both the sets is same, i.e., $n (A) = 2$ and $n (B) = 2$ .
Since both the sets have same cardinal number, therefore they are called as Equivalent sets.

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