MTH202- Discrete Mathematics MIDTERM solve papers Spring 2011

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Question No: 1 ( Marks: 1 ) - Please choose one
The negation of “Today is Friday” is

► Today is Saturday
► Today is not Friday
► Today is Thursday

Question No: 2 ( Marks: 1 ) - Please choose one
An arrangement of rows and columns that specifies the truth value of a compound proposition for all possible truth values of its constituent propositions is called

► Truth Table

► Venn diagram

► False Table

► None of these


Question No: 3 ( Marks: 1 ) - Please choose one
For two sets A,B
A ∩ (B U C) = (A ∩ B) U(A∩ C) is called

► Distributivity of intersection over union
► Distributivity of union over intersection
► None of these - Distributivity Law

Question No: 4 ( Marks: 1 ) - Please choose one
An argument is _____ if the conclusion is true when all the premises are true.

► Valid

► Invalid

► False

► None of these


Question No: 5 ( Marks: 1 ) - Please choose one
The row in the truth table of an argument where all premises are true is called

► Valid row

► Invalid row

► Critical row

► None of these



Question No: 6 ( Marks: 1 ) - Please choose one
Check whether
36 1 (mod 5) 36 Modulus5 = 1 remainder
33 3 (mod10) 33 Modulus10 = 3 remainder


► Both are equivalent
► Second one is equivalent but first one is not
► First one is equivalent but second one is not

Question No: 7 ( Marks: 1 ) - Please choose one
A binary relation R is called Partial order relation if

► It is Reflexive and transitive
► It is symmetric and transitive
► It is reflexive, symmetric and transitive
► It is reflexive, antisymmetric and transitive

Question No: 8 ( Marks: 1 ) - Please choose one
The order pairs which are not present in a relation, must be present in

► Inverse of that relation
► Composition of relations
► Complementry relation of that relation

Question No: 9 ( Marks: 1 ) - Please choose one
The relation as a set of ordered pairs as shown in figure is



► {(a,b),(b,a),(b,d),(c,d)}
► {(a,b),(b,a),(a,c),(b,a),(c,c),(c,d)}
► {(a,b), (a,c), (b,a),(b,d), (c,c),(c,d)}
► {(a,b), (a,c), (b,a),(b,d),(c,d)}

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