State in each case whether A ⊂ B or A ⊄ B.

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Question:
State in each case whether A ⊂ B or A ⊄ B.

$A=\phi, B=\{0\}$

Solution:

A ⊂ B

Explanation: A is a : set. Since, ϕ is a subset of every set therefore A ⊂ B.