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MTH202 Grand Quiz + Mid Term Quiz Fall 2020 Preparation Material Due Date: 30-12-2020

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# MTH202 MIDTERM AND FINAL TERM SOLVED PAPERS

##### MTH202 midterm and Final term solved papers by moaaz, Waqar Sidhu and other virtual university students.

The virtual university of Pakistan offers a program  Discrete Mathematics( MTH202) for their students. Here you can download handouts, MTH202 midterm and final term solved papers by moaaz, Waqar Sidhu and other virtual university students. This is a great opportunity for you to get prepare for the exam through past papers and get good marks in your virtual university Exams. Click on the link below… #### MTH202 MIDTERM SOLVED QUIZ/GRAND QUIZ

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MTH-202 Grand Quiz Solution |Aqsa Samir| MTH202 Midterm Grand Quiz

# MTH202 Grand Quiz No 1 || MTH202 MidTerm Quiz Exam

MTH202 Grand Quiz Solution 2020 By Maria Parveen | MTH202 Midterm Grand Quiz Fall 2020 | VU Learning

# Discrete Mathematics (MTH202) Solved MCQS

Multiple Choice Questions (MCQs)

## Objective Questions

1. An integer n is a perfect square if and only if ________ for some integer k.

1. n = 2k
2. n = k^2
3. n = square-root of k
4. n = k^3
2. ∼(P → q) is logically equivalent to _________.

1. p ∧ ∼q
2. p ∨ ∼q
3. ∼p ∧ q
4. ∼p ∨ q
3. Which of the following statements is true according to the Division Algorithm?

1. 17 = 5 x 1 + 12
2. 17 = 5 x 3 + 2
3. 17 = 5 x 4 - 3
4. 17 = 5 x 5 - 8
4. How many possible outcomes are there when a fair coin is tossed four times?

1. 4
2. 8
3. 16
4. 32
5. Suppose there are 8 different tea flavors and 5 different biscuit brands. A guest wants to take one tea and one brand of biscuit. How many choices are there for this guest?

1. 5
2. 8
3. 13
4. 40
6. If f and g are two one-to-one functions, then their composition that is gof is one-to-one.

1. TRUE
2. FALSE
7. 'p is equivalent to q' means ________.

1. p is not necessary but p is sufficient for q.
2. p is neither necessary nor sufficient for q.
3. p is necessary and sufficient for q.
4. p is necessary but not sufficient for q.
8. If A = Set of students of virtual university then A has been written in the _________.

1. Tabular form
2. Set builder form
3. Descriptive form
4. A is not a set
9. Let g be a function defined by g(x) = x + 1. Then the composition of (g o g)(x)is ______.

1. x
2. x + 1
3. x + 2
4. x2 + 2x + 1
10. If a function (g o f)(x):X→Z is defined as (g o f)(x) = g(f(x)) for all x ∈ X. Then the function ________ is known as composition of f and g.

1. (f o g)
2. f-1(g(x))
3. (g o f)
4. g-1(f(x))
11. If p = It is raining, q = She will go to college
"It is raining and she will not go to college”
will be denoted by

1. p ∧ ∼q
2. p ∧ q
3. ∼(p ∧ q)
4. ∼p ∧ q
12. Range of the relation {(0,1), (3,22), (90,34)} is __________ .

1. {0, 3, 90}
2. {1, 22, 34}
3. {0, 1, 3}
4. {0, 1, 3, 22, 90, 34}
13. P(0, 0)=______?

1. 0
2. 1
3. 2
4. undefined
14. x belongs to A or x belongs to B, therefore x belongs to ________.

1. A intersection B
2. A union B
3. A difference B
4. A symmetric difference B
15. Let R be a relation on a set A. If R is symmetric then its compliment is __________.

1. Reflexive
2. Irreflexive
3. Symmetric
4. Antisymmetric
16. The contrapositive of the conditional statement 'If it is Sunday, then I go for shopping' is ________.

1. I do Not go for shopping, then it is Not Sunday.
2. I go for shopping, then it is Sunday.
3. I do Not go for shopping, then it is Sunday.
4. I go for shopping, then it is Not Sunday.
17. Let f(x) = x2 + 1 define functions f from R to R and c = 2 be any scalar, then c.f(x) is ______.

1. 2
2. x2 + 1
3. 2x2 - 1
4. 2x2 + 2
18. Find the number of the word that can be formed of the letters of the word “ELEVEN”.

1. 120
2. 110
3. 220
4. None of the given
19. Real valued function is a function that assigns _______ to each member of its domain.

1. negative real number
2. positive real number
3. only a real number
4. any arbitrary real number
20. A set is called finite, if and only if, it is the ________ or there is ________ .

1. empty set, onto
2. empty set, one-to-one
3. one-to-one, onto
4. empty set, bijective
21. A non-zero integer d divides an integer n if and only if there exists an integer k such that _________.

1. n = d / k
2. n = d k
3. n = d + k
4. n = d - k
22. R = {(a,1), (b,2), (c,3), (d,4)} then the inverse of this relation is _______.

1. {(a,1), (b,2), (3,c), (4,d)}
2. {(1,a), (2,b), (3,c), (4,d)}
3. {(a,1), (2,b), (3,c), (4,d)}
4. {(1,a), (b,2), (3,c), (4,d)}
23. The set Z of all integers is _____.

1. uncountable
2. countable
24. Which relations below are functions?
R1 = {(3,4), (4,5), (6,7), (8,9)}
R2 = {(3,4), (4,5), (6,7), (3,9)}
R3 = {(-3,4), (4,-5), (0,0), (8,9)}
R4 = {(8,11), (34,5), (6,17), (8,19)}

1. R1 and R3 are functions
2. R1 and R2 are functions
3. R2 and R4 are functions
4. R3 and R2 are functions
25. The disjunction p ∨ q is False when ________.

1. p is False, q is True.
2. p is True, q is False.
3. p is True, q is True.
4. p is False, q is False.
26. Determine values of x and y, where (2x, x + y) = (8, 6).

1. x = 3 and y = 5
2. x = 4 and y = 2
3. x = 6 and y = 12
4. x = 4 and y = 12
27. Among 20 people, 15 either swim or jog or both. If 5 swim and 6 swim and jog, how many jog?

1. 6
2. 16
3. 24
4. 46
28. If A and B are any two sets, then A − B = B − A

1. True
2. False
29. A predicate becomes _________ when its variables are given specific values.

1. sentence
2. statement
3. algorithm
4. iteration
30. The logical statement p ∧ q means ________.

1. p OR q
2. p NOT q
3. p AND q
4. p XOR q
31. Let p → q be a conditional statement, then the statement q → p is called ________.

1. Inverse
2. Converse
3. Contrapositive
4. Double conditional
32. The switches in parallel act just like ________.

1. NOT gate
2. AND gate
3. OR gate
4. XOR gate
33. A student can choose a computer project from one of the two lists. The two lists contain 12 and 18 possible projects, respectively. How many possible projects are there to choose from?

1. 12
2. 18
3. 30
4. 216
34. A box contains 5 different colored light bulbs. Which of the followings is the number of ordered samples of size 3 with replacement?

1. 8
2. 15
3. 125
4. 243
35. In how many ways a student can choose one of each of the courses when he is offered 3 mathematics courses, 4 literature courses and 2 history courses.

1. 9
2. 24
3. 288
4. 14
36. Let p1, p2, p3 be True premises in a given Truth Table. If the conjunctions of the Conclusion with each of p1, p2, p3 are True, then the argument is ________.

1. False
2. True
3. Invalid
4. Valid
37. The converse of the conditional statement 'If I live in Quetta, then I live in Pakistan' is ________.

1. If I live in Pakistan, then I live in Quetta.
2. If I live in Pakistan, then I do Not live in Quetta.
3. If I do Not live in Quetta, then I do Not live in Pakistan
4. If I do Not live in Quetta, then I live in Pakistan
38. A tree is normally constructed from ________.

1. right
2. center
3. left to right
4. right to left
39. The converse of the conditional statement p → q is

1. q → p
2. ∼q → ∼p
3. ∼p → ∼q
4. None of the given
40. In how many ways a student can choose a course from 2 science courses,3 literature courses and 5 art courses.

1. 30
2. 10
3. 1440
4. 240
41. The functions 'f' and 'g' are inverse of each other if and only if their composition gives _______.

1. constant function
2. identity function
3. bijective function
4. injective function
42. There are three bus lines between A and B, and two bus lines between B and C. Find the number of ways a person can travel round trip by bus from A to C by way of B?

1. 5
2. 6
3. 10
4. 36
43. If p is false and q is true, then ∼p ↔ q is ________.

1. True
2. False
44. Let A and B be subsets of U with n(A) = 12, n(B) = 15, n(A') = 17, and n(A intersection B) = 8, then n(U)=______ .

1. 27
2. 29
3. 20
4. 35
45. Let A = {1, 2, 3, 4} and B = {7} then the constant function from A to B is _________ .

1. Onto
2. One to one
3. Both one to one and onto
4. Neither one to one nor onto
46. A student is to answer five out of nine questions on exams. Find the number of ways that can choose the five questions.

1. 216
2. 316
3. 126
4. None of the given
47. If r is a positive real number, then the value of r in 3.r.r = −27r is ________.

1. −9
2. +9
3. 0
4. None of the given
48. Let p be True and q be True, then ( ∼p ∧ q ) is ________.

1. t ( where t is tautology. )
2. c ( where c is contradiction. )
3. True
4. False
49. ( p ∨ ∼p ) is the ________.

2. Conjunction
3. Tautology
4. Contingency
50. Which of the followings is the product set A * B * C ? where A = {a}, B = {b}, and C = {c, d}.

1. {(a, b, c), (a, b, d)}
2. {(a, c, b), (a, d, b)}
3. {(b, c, a), (b, d, a)}
4. {(c, b, a), (d, b, a)}
1. One-to-One correspondence means the condition of ______.

1. one-One
2. identity
3. onto
4. one-One and onto
2. What is the truth value of the sentence?
'It rains if and only if there are clouds.'

1. True
2. False
3. The conjunction p ∧ q is True when _________.

1. p is True, q is False
2. p is False, q is True
3. p is True, q is True
4. p is False, q is False
4. Let R be a relation on a set A. If R is reflexive then its compliment is ____________.

1. Reflexive
2. Irreflexive
3. Symmetric
4. Antisymmetric
5. If A and B be events with P(A) = 1/3, P(B) = 1/4 and P(A ∩ B) = 1/6, then P(A ∪ B) = ________ .

1. 2/3
2. 5/12
3. 1/24
4. 1/2
6. Let R be the universal relation on a set A then which one of the following statement about R is true?

1. R is not symmetric
2. R is not reflexive
3. R is not transitive
4. R is reflexive, symmetric and transitive.
7. The statement p → q is logically equivalent to ∼q → ∼p

1. True
2. False
8. The disjunction of p and q is written as ________.

1. p ∨ q
2. p ∧ q
3. p XOR q
4. None of the given
9. Find the number of distinct permutations that can be formed using the letters of the word ”BENZENE”

1. 120
2. 220
3. 320
4. 420
10. If order matters and repetition is allowed, then which counting method should be used in order to select 'k' elements from a total of 'n' elements?

1. K-Selection
2. K-Sample
3. K-combination
4. K-Permuatation
11. If X and Y are independent random variables and a and b are constants, then Var(aX + bY)is equal to

1. aVar(X) + bVar(Y)
2. (a + b)[Var(X) + Var(Y)]
3. Var(aX) + Var(bY)
4. a^2 Var(X) + b^2 Var(Y)
12. Let A = {2, 3, 5, 7}, B = {2, 3, 5, 7, 2}, C = Set of first five prime numbers. Then from the following which statement is true ?

1. A = B
2. A = C
3. B = C
4. All the three sets are equal.
13. The method of loop invariants is used to prove __________ of a loop with respect to certain pre and post-conditions.

1. falseness
2. correctness
14. For the following relation to be a function, x can not be what values?
R = {(2,4), (x,1), (4,2), (5,6)}

1. x cannot be 2, 4 or 5
2. x cannot be 4, 1 or 6
3. x cannot be 2, 4 or 6
4. x cannot be 1, 2 or 6
15. If X and Y are random variables, then E(aX) is equal to

1. E(aX)
2. aE(X)
3. aX
4. None of the given
16. The set of prime numbers is _________.

1. finite set
2. infinite set
3. continuous set
4. None of the given
17. If X and Y are independent random variables, then E(XY) is equal to

1. E(XY)
2. XE(Y)
3. YE(X)
4. E(x)E(y)
18. Reductio and absurdum' is another name of _________.

1. Direct Method of proof
3. proof by contapositive
4. None of the given
19. If p is false and q is false, then ∼p implies q is ________.

1. True
2. False
20. Let A = {1, 2, 3} and B = {2, 4} then number of functions from A to B are _________.

1. 6
2. 8
3. 16
4. 64
21. Let X = {2, 4, 5} and Y= {1, 2, 4} and R be a relation from X to Y defined by R = {(2,4), (4,1), (a,2)}. For what value of ‘a‘ the relation R is a function ?

1. 1
2. 2
3. 4
4. 5
22. There are 5 girls students and 20 boys students in a class. How many students are there in total ?

1. 4
2. 15
3. 25
4. 100
23. The functions f o g and g o f are always equal.

1. TRUE
2. FALSE
24. In how many ways can 6 people be seated on 6 available seats?

1. 120
2. 6
3. 12
4. 720
25. (-2)! = _________ ?

1. -2
2. 0
3. 2
4. Undefined
26. Which of the followings is the factorial form of 5 . 4?

1. 5/3
2. 5!/3
3. 5!/3!
4. 5/3!
27. The negation of “Today is Friday” is

1. Today is Saturday
2. Today is not Friday
3. Today is Thursday
4. None of the given
28. If p ↔ q is True, then ________.

1. Only p is True.
2. Only q is True.
3. p and q both are True.
4. None of the given.
29. Let X = {1, 2, 3}, then 2-combinations of the 3 elements of the set X are _________?

1. {1, 2}, {1, 3} and {2, 3}
2. {1, 2}, {2, 1}, {1, 3}, {3, 1}, {2, 3}, and {3, 2}
3. {1, 2}, {2, 1}, {1, 3} and {2, 3}
4. {1, 2}, {2, 1},{1, 3} and {3, 1}
30. The number of the words that can be formed from the letters of the word,“COMMITTEE” are

1. 9p9
2. 9C9
3. 9! / (2!2!2!)
4. None of the given
31. Let f(x) = 3x and g(x) = x + 2 define functions f and g from R to R, then (f.g)(x) is _____.

1. 2x − 2
2. 3x + 2
3. 4x + 2
4. 3x2 + 6x
32. Let R be a relation on a set A. If R is reflexive then its compliment is ________ .

1. Reflexive
2. Irreflexive
3. Symmetric
4. Antisymmetric
33. The total number of terms in an arithmetic series 0 + 5 + 10 + 15 + .... + 50 are ________.

1. 9
2. 10
3. 11
4. infinite
34. What is the minimum number of students in a class to be sure that two of them are born in the same month?

1. 11
2. 12
3. 13
4. 14
35. A Random variable is also called a _________.

1. Chance Variable
2. Constant
36. If A and B are disjoint finite sets then n(A ∪ B) = ______.

1. n(A) − n(B)
2. n(A) + n(B) − n(A ∩ B)
3. n(A) + n(B)
4. n(A) + n(B) + n(A ∩ B)
37. Which of the followings is the product set A * B * C ? where A = {a}, B = {b}, and C = {c, d}.

1. {(a, b, c), (a, b, d)}
2. {(a, c, b), (a, d, b)}
3. {(b, c, a), (b, d, a)}
4. {(c, b, a), (d, b, a)}
38. Let f(x)=3x and g(x) = 3x − 2 define functions f and g from R to R. Then (f+g)(x) = ________.

1. −2
2. 6x + 2
3. 6x − 2
4. 6x.x − 2
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