Quiznetik

Mathematics for Economic Analysis 1 | Set 2

1. If the number of elements of the two sets are equal, then they are called

Correct : B. equivalent set

2. If a set has three elements, then its power set consist of ----- elements

Correct : D. 8

3. Given A in 2x2 and B is 2x4, then the matrix AB will be of the order

Correct : B. 2x4

4. Maximum number of linearly independent rows and columns of a matrix is called

Correct : A. rank

5. Determinant of a 3X3 square matrix is called ----- determinant

Correct : C. third order

6. The set consisting of all the elements which belong to A as well as B is called

Correct : B. intersection

7. The total number of elements of the set of all possible outcome when two coins are tossed

Correct : C. 4

8. Special type of relation is

Correct : A. function

9. Rectangular array of numbers, variables or parameters is called

Correct : C. matrix

10. When the demand for a good is given by Q=50-P, the maximum amount that would be demanded at nil price

Correct : D. 50

11. Given A={a,b,c} and B={a,d,c}, then AUB will be

Correct : D. a,b,c,d

12. in a square matrix, the elements lie from left top to right bottom is

Correct : A. diagonal elements

13. if all the elements below the leading diagonal are zero in a square matrix, it is

Correct : B. identity matrix

14. conformity condition for matrix addition is that matrices should be

Correct : B. same order

15. commutative law of matrix subtraction is

Correct : C. a-b= -b+a

16. In matrix algebra (AB)C=A(BC) is

Correct : A. associative

17. In matrix expression of linear equation, AX=B, X denotes

Correct : D. solution vector

18. If in a matrix any two rows or columns are identical or proportional or linearly dependent, the determinant will be

Correct : B. zero

19. Given the demand curve, P=20-0.2Q, the revenue curve will be

Correct : D. 20q-0.2q2

20. The slope of isocost line is the ratio of

Correct : B. input prices

21. The line of linear equation should begin from

Correct : D. any of the above

22. For a matrix minor of element M33 =25, the cofactor is

Correct : B. 25