Objective Questions and Answers of MBA: Business Mathematics 10

Subject: Objective Questions and Answers of MBA: Business Mathematics 10

**Part 10: Objective questions and answers of Business Mathematics**

**Q1. For 1) 2a +c -2d = 5**

**2) –a +2b +c = 4**

**3) +b -c +3d = 1**

**4) 2a -b +2c -5d = 4**

a) Equation 1 is dependent on 3 and 4

b) Equation 2 is dependent on 3 and 4

c) Equation 1 is dependent on 2 and 3

d) None

**Q2. Inverse of a square matrix A, denoted by A-1 is also a square matrix of the same order such that A A-1 is**

a) A-1

b) A

c) I

d) AI

**Q3. If A, B are symmetric matrices of the same order, then AB – BA is a**

a) Skew symmetric matrix

b) Symmetric matrix

c) Zero matrix

d) Identity matrix

**Q4. Let A be a square matrix of order 3 x 3, then | kA | is equal to**

a) k | A |

b) k^2 | A |

c) k^3 | A |

d) 3k | A |

**Q5. If A is an invertible matrix of order 2, then det( A^-1 ) is equal to**

a) det( A)

b) 1/det( A)

c) 1

d) 0

**Q6. If R is a relation from a finite set A having m elements to a finite set B having n elements, then the number of relations from A to B is**

a) 2mn

b) 2mn -1

c) 2mn

d) Mn

**Q7. Solve x +2y +3z = 85**

**3x +2y +2z = 105**

**2x +3y +2z = 110**

a) x =16, y=18, z=9

b) x=15, y=20, z=10

c) x=17, y=21, z=11

d) x=12, y=22, z=12

**Q8. Solve x +2y –z =2 by finding inverse of the coefficient matrix**

**3x -4y +2z =1**

**-x +3y –z = 4**

a) x=2, y=3, z=4

b) x=1, y=2, z=3

c) x=2, y=-3, z=-4

d) x=1, y=4, z=7

**Q9. If the set has p elements, b has q elements, the no of elements in A x B is**

a) p + q

b) p + q + 1

c) pq

d) p^2

**Q10. If b = f(a) and f(a) = (a – 1) / (a + 1), which of the following is true?**

a) f(2a) = f(a) + 1

b) f(1/a) = -f(a)

c) a = f(b) + f(1/a)

d) a = f(b)

**Q11. Is xyz**

a) Non linear

b) Linear

c) Binomial

d) None

**Q12. A diagonal matrix in which all diagonal elements are equal is called**

a) Unit matrix

b) Null matrix

c) Scalar matrix

d) Triangular matrix

**Q13. If A = a b is such that A^2= I, then c – a**

a) 1+ a^2 + bc =0

b) 1 –a^2 + bc =0

c) 1 –a^2 -bc = 0

d) 1 +a^2 -bc=0

**Q14. Equation of line joining (1,2) and (3,6) using determinants is**

a) y = 3x

b) y =2x

c) x = 2y

d) x =3x

**Q15. The equation 6x + y =7 will have a solution if**

**3x + y =4**

**-6x -2y = a**

a) a= -5

b) a= -6

c) a= -7

d) a= -8

**Q16. Solve 2x –y -2z =0**

**x +2y -3z =9**

**3x –y -4z = 3**

a) x= -1, y=2, z =-2

b) x=-2, y=1, z=-1

c) x=2, y=-1, z=-2

d) x=-1, y=3,z=-2

**Q17. Are**

**1) 2x +4y -z = 5**

**2) y +z = 2**

**3) x + y +z = 7**

a) Equation 1 is dependent on 2 and 3

b) Equation 2 is dependent on 1 and 3

c) Equation 3 is dependent on 1 and 2

d) Done of the above

**Q18. Let f(x) = x / x+ 3, then f (x + 1) =**

a) 3x + 2/ x+ 2

b) x + 1 / x + 4

c) (x + 1) / (x + 3)

d) 2 x + 3 / (x + 3)

**Q19. If A = {1, 2, 3}, B = {1,4,6, 9} and R is a relation from A to B defined by x is greater than y. The range of R is**

a) {1, 4, 6, 9}

b) {4, 6, 9}

c) {1}

d) None of these

**Q20. Which one of the following form of asset the brand has _________**

a) Tangible assets

b) Intangible assets

c) Current assets

d) Fixed assets

**Part 10: Objective questions and answers of Business Mathematics**

Q1. Answer a

Q2. Answer c

Q3. Answer a

Q4. Answer c

Q5. Answer b

Q6. Answer a

Q7. Answer b

Q8. Answer d

Q9. Answer c

Q10. Answer b

Q11. Answer a

Q12. Answer c

Q13. Answer b

Q14. Answer b

Q15. Answer d

Q16. Answer a

Q17. Answer d

Q18. Answer b

Q19. Answer c

Q20. Answer b

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