Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Engineering Mathematics Mathematical Logic Propositional Logic
p is the proposition “ Indian army moves back”
q is the proposition “ Chinese army moves back”
r is the proposition “ There is no war”
Then what is the contrapositive of the statement “ If Indian army moves back and Chinese army moves back, then there is no war”
1
~r→(~p→~q)
2
r→(p∧q)
3
~(p∧q)→~r
4
~r→~(p∧q)