Which of the following correctly distinguishes set X (letters of 'ALLOY') and set B (letters of 'LOYAL')?
AX ⊂ B but B ⊄ X
BX has 5 elements; B has 5 elements; X ≠ B
CX = {A, L, O, Y}; B = {L, O, Y, A, L}; X = B
DX and B differ since 'ALLOY' has two Ls but 'LOYAL' has one L
Answer & Solution
Correct answer: C. X = {A, L, O, Y}; B = {L, O, Y, A, L}; X = B
A set is unaffected by repetition. Both unique letter sets are {A, L, O, Y}, so X = B. The 'two L's' argument confuses string content with set elements.
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