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JEE Main202229 Jul 2022Morning ShiftMathematicsMathematical ReasoningActual

The statement p ∧ q ⇒ p ∧ r is equivalent to

Options

  1. Aq ⇒ p ∧ r
  2. Bp ⇒ p ∧ r
  3. Cp ∧ r ⇒ p ∧ q
  4. Dp ∧ q ⇒ r

Correct answer

D. p ∧ q ⇒ r

Step-by-step solution

Given, p ∧ q ⇒ p ∧ r Using A ⇒ B ≡ ~ A ∨ B = ~ p ∧ q ∨ p ∧ r Using Demorgan's law ~ A ∧ B ≡ ~ A ∨ ~ B = ~ p ∨ ~ q ∨ p ∧ r = ~ p ∨ p ∧ r ∨ ~ q = ~ p ∨ p ∧ ~ p ∨ r ∨ ~ q = ~ p ∨ r ∨ ~ q = ~ p ∨ ~ q ∨ r = ~ p ∧ q ∨ r = p ∧ q ⇒ r

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