1. |
## Suppose there is a Set S, which is the largest possible subset of S |

A. | s1 |

B. | s |

C. | ∅ |

D. | none of these |

Answer» B. s |

2. |
## Suppose there is a set S, which is the smallest possible subset of S |

A. | s1 |

B. | s |

C. | ∅ |

D. | none of these |

Answer» C. ∅ |

3. |
## If a set has n elements, the total number of subsets will be |

A. | 2n |

B. | 2n |

C. | 2/n |

D. | none of these |

Answer» A. 2n |

4. |
## If a set S1 has n elements and S2 has m elements, how many ordered pairs can form in general? |

A. | m x n |

B. | m + n |

C. | m/n |

D. | none of these: |

Answer» A. m x n |

5. |
## 2 24.……………. is known as a signed minor |

A. | rank |

B. | cofactor |

C. | inverse |

D. | none |

Answer» C. inverse |

6. |
## A set which contains only one element is called |

A. | singleton set |

B. | finite set |

C. | proper set |

D. | none of these |

Answer» A. singleton set |

7. |
## If all the sets under consideration are subsets of a fixed set say ∪, then this set ∪ is called |

A. | universal set |

B. | power set |

C. | disjoint set |

D. | finite set |

Answer» A. universal set |

8. |
## Two sets A and B are said to be …………………. sets if no element of A is in B and no element of B is in A. |

A. | universal |

B. | disjoint |

C. | equivalent |

D. | none of these |

Answer» B. disjoint |

9. |
## A matrix with equal number of rows and columns is called: |

A. | row matrix |

B. | column matrix |

C. | square matrix |

D. | none |

Answer» C. square matrix |

10. |
## A square matrix in which all elements except those in diagonal are zero are called: |

A. | diagonal matrix |

B. | identity matrix |

C. | null matrix |

D. | none |

Answer» A. diagonal matrix |

11. |
## A diagonal matrix with all its diagonal elements equal to 1 is known as: |

A. | triangular matrix |

B. | zero matrix |

C. | identity matrix |

D. | none |

Answer» C. identity matrix |

12. |
## A matrix in which every element is zero is called |

A. | scalar matrix |

B. | null matrix |

C. | square matrix |

D. | inverse matrix |

Answer» B. null matrix |

13. |
## Matrix obtained by inter changing the rows and columns is called ………… of a matrix |

A. | inverse |

B. | transpose |

C. | negative |

D. | none |

Answer» B. transpose |

14. |
## The matrix A is idempotent if: |

A. | a2 = a |

B. | a = at |

C. | a2 = at |

D. | none |

Answer» A. a2 = a |

15. |
## If A and B are square matrices such that AB = BA, then A and B are called………….. |

A. | additive |

B. | multiplicative |

C. | divisive |

D. | commutative |

Answer» D. commutative |

16. |
## If =1 23 −4 =0 −67 8, then A+B is equal to |

A. | 1 −410 4 |

B. | 7 9 −3 −4 |

C. | 3 −36 7 |

D. | none |

Answer» A. 1 −410 4 |

17. |
## If = [1 0 6] = [5 4 3], A+B is: |

A. | [19] |

B. | [6 0 9] |

C. | [6 4 9] |

D. | none |

Answer» C. [6 4 9] |

18. |
## If A is a 3 × 2 matrix, B is a 2 × 3 matrix, C is a 2 × 2 matrix and D is a 3 × 3 matrix, then which of the following products does not exist? |

A. | ab |

B. | ac |

C. | bd |

D. | cd |

Answer» D. cd |

19. |
## The determinant of matrix =4 6 3 8 is: |

A. | 14 |

B. | 7 |

C. | -1 |

D. | 3 |

Answer» A. 14 |

20. |
## If all the elements of any row or column are zero, the determinant is zero. |

A. | unity |

B. | positive |

C. | negative |

D. | zero |

Answer» D. zero |

21. |
## The determinant that results when the row and column in which that element lies are deleted is called: |

A. | cofactor |

B. | minor |

C. | inverse |

D. | none |

Answer» B. minor |

22. |
## An adjoint matrix is the ……………… of the cofactor matrix. |

A. | inverse |

B. | minor |

C. | cofactor |

D. | transpose |

Answer» B. minor |

23. |
## Inverse of A is denoted as |

A. | a−1 |

B. | at |

C. | at |

D. | ai |

Answer» A. a−1 |

24. |
## If the rows and columns of a determinant are interchanged, its value will: |

A. | change |

B. | change sign |

C. | not change |

D. | become zero |

Answer» C. not change |

25. |
## If a set consists of a specific number of different elements, it is called |

A. | infinite set |

B. | finite set |

C. | unit set |

D. | null set |

Answer» B. finite set |

Tags

Question and answers in Mathematical Tools for Economics 1,
Mathematical Tools for Economics 1 multiple choice questions and answers,
Mathematical Tools for Economics 1 Important MCQs,
Solved MCQs for Mathematical Tools for Economics 1,
Mathematical Tools for Economics 1 MCQs with answers PDF download

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