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SETS — MATHS STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceMATHSSETS1 Mark
Question
Let A = {a, b}, B = {a, b, c}. Is A $\subset$ B ? What is A $\cup$B?
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Answer

We have,
$A =\{a, b\}$
And, B = {a, b, c}
Here, it is clearly seen that all the elements of set A are present in set B
$\therefore \ A \subset B$
And, $A \cup B=\{a, b, c\}=B$

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