Discrete Mathematics - Propositional Logic

Let p and q be the following propositions: p: Fail grade can be given. q: Student scores more than 50% marks. Consider the statement: “Fail grade cannot be given when student scores more than 50% marks." Which one of the...

Let p, q, r denote the statements "It is raining", "It is cold", and "It is pleasant", respectively. Then the statement "It is not raining and it is pleasant, and it is not pleasant only if it is raining and it is cold"...