The logical statement [~(~p ∨ q) ∨ (p ∧ r)] ∧ (~q ∧ r) is equivalent to:

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JEE Mains Previous Paper 1 (Held On: 9 Jan 2019 Shift 2)
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  1. (~p ∧ ~q) ∧ r
  2. ~p ∨ r
  3. (p ∧ r) ∧ ~q
  4. (p ∧ ~q) ∨ r

Answer (Detailed Solution Below)

Option 3 : (p ∧ r) ∧ ~q
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JEE Main 04 April 2024 Shift 1
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Detailed Solution

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Logical statement given is,

[~(~p ∨ q) ∨ (p ∧ r)] ∧ (~q ∧ r)

⇒ [(p ∧ ~q) ∨ (p ∧ r)] ∧ (~q ∧ r)

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

⇒ [p ∧ ~q ∧ r] ∨ [p ∧ r ∧ ~q]

⇒ (p ∧ ~q) ∧ r

⇒ (p ∧ r) ∧ ~q

Hence, [~(~p ∨ q) ∨ (p ∧ r)] ∧ (~q ∧ r) = (p ∧ r) ∧ ~q
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