EasyMathematics
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If A ⊂ B and B ⊂ C then A ∪ C is equal to
A
C
B
B
C
A
D
None of these
Explanation
As A ⊂ B ⇒ all the elements of A are in B, B ⊂ C ⇒ all the elements of B are in C, ⇒ all the elements of A are in C, ⇒ A ⊂ C ⇒ A ∪ C = C.
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