UPSC 2017 CDS II Math Paper

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Question : 31 of 100

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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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