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1
JEE Main 2019 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Which one of the following Boolean expressions is a tautology?
A
(p $$ \vee $$ q) $$ \wedge $$ (~ p $$ \vee $$ ~ q)
B
(p $$ \vee $$ q) $$ \vee $$ ( p $$ \vee $$ ~ q)
C
(p $$ \wedge $$ q) $$ \vee $$ ( p $$ \wedge $$ ~ q)
D
(p $$ \vee $$ q) $$ \wedge $$ ( p $$ \vee $$ ~ q)
2
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
If p $$ \Rightarrow $$ (q $$ \vee $$ r) is false, then the truth values of p, q, r are respectively :-
A
F, F, F
B
T, F, F
C
F, T, T
D
T, T, F
3
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
For any two statements p and q, the negation of the expression
p $$ \vee $$ (~p $$ \wedge $$ q) is :
A
p$$ \leftrightarrow $$q
B
~p$$ \wedge $$~q
C
p$$ \wedge $$q
D
~p$$ \vee $$~q
4
JEE Main 2019 (Online) 8th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Which one of the following statements is not a tautology?
A
(p $$ \wedge $$ q) $$ \to $$ (~ p) $$ \vee $$ q
B
(p $$ \wedge $$ q) $$ \to $$ p
C
( p $$ \vee $$ q) $$ \to $$ ( p $$ \vee $$ (~q))
D
p $$ \to $$ ( p $$ \vee $$ q)
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