UPSC CDS Math Set Theory Questions

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Question : 6 of 14

Marks: +1, -0

Which one of the following is a correct statement ?

[2017 CDS-II]

{x : x + 5 = 5} = ϕ
{x : x + 5 = 5} = {0}
{x : x + 5 = 5} = 0
{x : x + 5 = 5} = {ϕ}

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