Question:
From the sets given below, pair the equivalent sets:
$A=\{1,2,3\}, B=\{t, p, q, r, s\}, C=\{\alpha, \beta, \gamma\}, D=\{a, e, i, o, u\}$
Solution:
Two sets A & B are equivalent if their cardinal numbers are equal, i.e., n(A) = n(B).
n(A) = 3
n(B) = 5
n(C) = 3
n(D) =5
Therefore, equivalent sets are (A and C) and (B and D).