Which of the following Boolean expression is a tautology ?
$(p \wedge q) \vee(p \vee q)$
$(p \wedge q) \vee(p \rightarrow q)$
$(p \wedge q) \wedge(p \rightarrow q)$
$( p \wedge q ) \rightarrow( p \rightarrow q )$
Negation of the statement : - $\sqrt{5}$ is an integer or $5$ is irrational is
Which one of the following, statements is not a tautology
The negative of the statement $\sim p \wedge(p \vee q)$ is
The contrapositive of the statement "If you will work, you will earn money" is ..... .