McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Arts in Economics (BA Economics) .
| 101. |
AA-1= ----- = A-1A |
| A. | i |
| B. | a |
| C. | a2 |
| D. | 0 |
| Answer» A. i | |
| 102. |
If the number of elements of the two sets are equal, then they are called |
| A. | equal set |
| B. | equivalent set |
| C. | order set |
| D. | subset |
| Answer» B. equivalent set | |
| 103. |
If a set has three elements, then its power set consist of ----- elements |
| A. | 3 |
| B. | 5 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 104. |
The set of all elements which belong to set B but do not belong to set A is |
| A. | aub |
| B. | a-b |
| C. | b-a |
| D. | acb |
| Answer» C. b-a | |
| 105. |
Given A in 2x2 and B is 2x4, then the matrix AB will be of the order |
| A. | 2x2 |
| B. | 2x4 |
| C. | 4x2 |
| D. | 1x2 |
| Answer» B. 2x4 | |
| 106. |
If the matrix CxC =C, the matrix C is |
| A. | square matrix |
| B. | triangular matrix |
| C. | idempotent matrix |
| D. | identity matrix |
| Answer» D. identity matrix | |
| 107. |
Maximum number of linearly independent rows and columns of a matrix is called |
| A. | rank |
| B. | adjoint |
| C. | determinant |
| D. | inverse |
| Answer» A. rank | |
| 108. |
Determinant of a 3X3 square matrix is called ----- determinant |
| A. | first order |
| B. | second order |
| C. | third order |
| D. | fourth order |
| Answer» C. third order | |
| 109. |
The set consisting of all the elements which belong to A as well as B is called |
| A. | union |
| B. | intersection |
| C. | complement |
| D. | partition |
| Answer» B. intersection | |
| 110. |
The total number of elements of the set of all possible outcome when two coins are tossed |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» C. 4 | |
| 111. |
If the relation is defined as from A to B, then relation from B to A |
| A. | relation |
| B. | inverse relation |
| C. | function |
| D. | binary |
| Answer» B. inverse relation | |
| 112. |
Special type of relation is |
| A. | function |
| B. | binary relation |
| C. | inverse |
| D. | none of the above |
| Answer» A. function | |
| 113. |
Rectangular array of numbers, variables or parameters is called |
| A. | set |
| B. | exponents |
| C. | matrix |
| D. | function |
| Answer» C. matrix | |
| 114. |
When A = {0}, the set A is |
| A. | null |
| B. | equal |
| C. | singleton |
| D. | all of the above |
| Answer» C. singleton | |
| 115. |
Given A={a,b,c} and B={a,d,c}, then AUB will be |
| A. | a,b,c |
| B. | a,d,c |
| C. | c,d,a |
| D. | a,b,c,d |
| Answer» D. a,b,c,d | |
| 116. |
in a square matrix, the elements lie from left top to right bottom is |
| A. | diagonal elements |
| B. | row elements |
| C. | column elements |
| D. | triangular elements |
| Answer» A. diagonal elements | |
| 117. |
if all the elements below the leading diagonal are zero in a square matrix, it is |
| A. | lower triangular matrix |
| B. | identity matrix |
| C. | inverse matrix |
| D. | upper triangular matrix |
| Answer» B. identity matrix | |
| 118. |
conformity condition for matrix addition is that matrices should be |
| A. | square |
| B. | same order |
| C. | equal |
| D. | proportional |
| Answer» B. same order | |
| 119. |
commutative law of matrix subtraction is |
| A. | a+b=b+a |
| B. | a-b=b-a |
| C. | a-b= -b+a |
| D. | a+b=a-b |
| Answer» C. a-b= -b+a | |
| 120. |
In matrix algebra (AB)C=A(BC) is |
| A. | associative |
| B. | commutative |
| C. | distributive |
| D. | none of the above |
| Answer» A. associative | |
| 121. |
In matrix expression of linear equation, AX=B, X denotes |
| A. | coefficient matrix |
| B. | constants |
| C. | identity matrix |
| D. | solution vector |
| Answer» D. solution vector | |
| 122. |
Given the demand curve, P=20-0.2Q, the revenue curve will be |
| A. | 20-0.2q |
| B. | 10-.1q |
| C. | 20q-0.2q |
| D. | 20q-0.2q2 |
| Answer» D. 20q-0.2q2 | |
| 123. |
If the demand curve is linear and negatively sloped, the marginal revenue curve has a slope |
| A. | negative |
| B. | positive |
| C. | infinite |
| D. | none of the above |
| Answer» A. negative | |
| 124. |
The slope of isocost line is the ratio of |
| A. | quantities |
| B. | input prices |
| C. | costs |
| D. | product prices |
| Answer» B. input prices | |
| 125. |
The line of linear equation should begin from |
| A. | the origin |
| B. | x axis |
| C. | y axis |
| D. | any of the above |
| Answer» D. any of the above | |
| 126. |
For a matrix minor of element M33 =25, the cofactor is |
| A. | -25 |
| B. | 25 |
| C. | 0 |
| D. | 33 |
| Answer» B. 25 | |
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