KEAM 2014 Math Paper

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Question : 92 of 120

Marks: +1, -0

Let p, q and r be any three logical statements. Which one of the following is true?

~[p∧(~q)]≣(~p)∧q
~(p∨q)∧(~r)≣(~p)∨(~q)∨(~r)
~[p∨(~q)]≣(~p)∧q
~[p∧(~q)]≣(~p)∧~q
~[p∧(~q)]≣p∧q

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