JEE Main202127 Aug 2021Evening ShiftMathematicsMathematical ReasoningActual
The Boolean expression ( p ∧ q ) ⇒ r ∧ q ∧ p is equivalent to:
Options
- A( p ∧ r ) ⇒ ( p ∧ q )
- B( q ∧ r ) ⇒ ( p ∧ q )
- C( p ∧ q ) ⇒ ( r ∧ q )
- D( p ∧ q ) ⇒ ( r ∨ q )
Correct answer
C. ( p ∧ q ) ⇒ ( r ∧ q )
Step-by-step solution
( p ∧ q ) ⇒ ( ( r ∧ q ) ∧ p ) ≡ ( p ∧ q ) ⇒ ( r ∧ ( p ∧ q ) ) … … . ( i ) Case: I when p ∧ q = T and r = F Statement - ( i ) is false as well as option ( 3 ) is also false option ( 1 ) , option ( 2 ) are True so given expression is not equivalent to option ( 1 ) , option ( 2 ) option ( 4 ) may be true if we consider q = T ∴ option ( 4 ) is also not equivalent to option ( 1 ) Case : I I p ∧ q = False