#### Question

Show that if A ⊂ B, then C – B ⊂ C – A.

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#### Solution

Let A ⊂ B

To show: C – B ⊂ C – A

Let *x* ∈ C – B

⇒ *x *∈ C and *x* ∉ B

⇒ *x* ∈ C and *x* ∉ A [A ⊂ B]

⇒ *x* ∈ C – A

∴ C – B ⊂ C – A

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#### Reference Material

Solution for question: Show that If a Subset B, Then C – B Subset C – A. concept: null - Subsets. For the courses CBSE (Arts), CBSE (Science), CBSE (Commerce)