PPSC Economics Topic 13 MCQS Test Preparation

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MCQ's Test For PPSC Economics Topic 13 Mathematics in Economics

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PPSC Economics Topic 13 Mathematics in Economics

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Question # 1

A linear function of the form 6x2 - 2y + 8 = 0 is known as.

Question # 2

Ordered Pairs of two sets are called.

Question # 3

The value of the dependent variable where the graph cuts the y-axis is called.

Question # 4

If A is a square matrix of order ' n' and lis the unit matrix of the same order then A 1 is equal to.

Question # 5

If the columns of a given matrix A and B are changed into rows and vice versa, the matrix thus obtained is called the.

Question # 6

If the determinant formed by the elements of the matrix A is equal to zero, then the matrix is.

Question # 7

The function y = 2x + 1 and x = 1/2 y - 1/2 are said to be.

Question # 8

Unknown values in an equation are called.

Question # 9

if in a matrix , the number if rows is the same as the number of columns, it is called.

Question # 10

If A and B are symmetric matrix, then AB- BA is.

Question # 11

any number raise to the power zero is always equal to.

Question # 12

A set continuing no elements is called.

Question # 13

The objects constituting a set are called

Question # 14

Relation between two numbers or variables are called.

Question # 15

If every element of a raw of column of a square matrix A is zero, then the value of the determinant. is.

Question # 16

The sufficient condition required for the matrix to posses inverse is that the matrix should be.

Question # 17

If a Set C contain all the elements which are present in both the set A and B then set C is called.

Question # 18

(A+B) = (B+A) this law of matrices is known as.

Question # 19

The set which contains all the element of the two given sets A and B, avoiding duplication, is called.

Question # 20

A determinant compose of all the second order partial derivatives, with the second order direct partials on the principal diagonal and the second order cross partials off the principal diagonal and which is used to second order condition of optimization is called.

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Sr. # Question Answer
1 "No two elements of a set are identical" this statements is.

A. Always true

B. Sometimes true

C.Not true

D. All of the above is possible

2 If all the elements of a matrix of any order are zero, it is called.

A. Identity matrix

B. Null matrix

C.Zero matrix

D. Both b and c

3 In a matrix , if there is only one row but any number of columns, it is called.

A. Row matrix

B. Column matrix

C.Raw vector

D. Both a and c

4 A set containing all the elements of the universal set except those of set A is called.

A. Complement of set A

B. Complement of universal set

C.Union of A and universals set

D. Universal set itself

5 The set of 'stars in the sky' is an example of

A. Countable set

B. Infinite set

C.Finite set

D. unit set

6 Given the demand function qo = -8p +2000 and tis inverse p = -1/8 qo + 250 ,p in the inverse function which is interpreted as the maximum price that buyers are willing to pay for the.

A. Supply price

B. Demand price

C.Equilibrium price

D. Reserved price

7 Unknown values in an equation are called.

A. Constants

B. Numeraire

C.Variables

D. All of the above

8 If B is a subset of A ,then A is a

A. Super set of B

B. Sub set of B

C.Empty set of B

D. Universal set of B

9 Given or known values in an equation are called.

A. Constants

B. Parameters

C.Coefficients

D. All of the above

10 If A and B are symmetric matrices, then A +B is

A. Symmetric

B. Non symmetric

C.Skew symmetric

D. Non skew symmetric

11 If A and B are symmetric matrix, then AB- BA is.

A. Symmetric

B. Skew symmetric matrix

C.Idempotent matrix

D. Orthogonal matrix

12 If B is a subset of A, then AUB =

A. B

B. Intersection of A and B

C.A

D. None of these

13 Union of A with B is same as union of B with A, that is AUB = BUA is termed as

A. Associative law of union

B. Cumulative law of union

C.Reflective law

D. All the above

14 The signed minor of the matrass A is called.

A. Adjoin

B. Co factor

C.Minor

D. Rank

15 A determinant composed of all the first order partial derivatives of a system of equations, arranged in ordered sequence is called.

A. Hassian determinatn

B. Jacobian determiant

C.Discrimianant

D. First order determinant

16 The point at which the graph cuts the x axis is called.

A. x- intercept

B. y - intercept

C.slope

D. None of these

17 If every element of a set B is also an elements of A then

A. A is a subset of B

B. B is a subset of A

C.A is not a subset of B

D. B is not a subset of A

18 A determinant compose of all the second order partial derivatives, with the second order direct partials on the principal diagonal and the second order cross partials off the principal diagonal and which is used to second order condition of optimization is called.

A. Jacobian determinant

B. Hessian determinant

C.Discriminant

D. None of these

19 Th transpose of the cofactor matrix is called.

A. Adjoin of the matrix

B. Power of a matrix

C.Minor of the matrix

D. Rank of a matrix

20 Union of A and a null set is equal is.

A. Intersection of A and null set

B. Null set

C.Both a and b

D. A

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