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

Union of A and a null set is equal is.

Question # 2

A polynomial equation with degree two a called.

Question # 3

A square matrix a such that A2 = a is called.

Question # 4

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

Question # 5

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 # 6

if two sets do not have any common element, then they are called.

Question # 7

A set totality of elements from all possible sets is called.

Question # 8

The increase in dependent variable that results when the independent variable increases by one unit in a simple lines. function is called.

Question # 9

The associative law of union is

Question # 10

Relation between two numbers or variables are called.

Question # 11

If matrix A is matrix of order n x m and B is another matrix of order m x n, then BA will be the matrix of order.

Question # 12

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.

Question # 13

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

Question # 14

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

Question # 15

The matrix A multiplies by its inverse will b e a.

Question # 16

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

Question # 17

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

Question # 18

A possible use in economies for the circle of the ellipse is to model.

Question # 19

Ordered Pairs of two sets are called.

Question # 20

If matrix A is of m x n dimension, then A will be

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Sr.# Question Answer
1 If matrix A is of m x n dimension, then A will be
A. n x m dimension
B. m x n dimension
C. n x p dimension
D. m x m dimension
2 A linear function of the form 6x2 - 2y + 8 = 0 is known as.
A. Explicit function
B. implicit function
C. Quadratic function
D. All of the above
3 AB = BA = 1 , then B is said to
A. Ad joint of matrix of A
B. Inverse matrix of A
C. Determinant of A
D. Cofactor of a
4 A set containing only one element is termed as
A. Unit set
B. Singleton set
C. Both a and b
D. None of these
5 The increase in dependent variable that results when the independent variable increases by one unit in a simple lines. function is called.
A. Y intercept of the curve
B. Slope of the curve
C. X intercept of the curve
D. Marginal value
6 (A+B) + C =a +(B+C) This law of matrices is known as.
A. Cumulative law
B. Associative law
C. Distributive law
D. Identity law
7 The signed minor of the matrass A is called.
A. Adjoin
B. Co factor
C. Minor
D. Rank
8 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
9 if we are told that the two statements y = 3x2 and y = x + 10' are bout true at the same time , they are called.
A. Implicit functions
B. explicit functions
C. Simultaneous equations
D. Quadratic equations
10 Union of A with A, that is A U A.
A. Complement of A
B. A itself
C. Con not be determined
D. None of these
11 A set continuing no elements is called.
A. Null set
B. mpty set
C. void set
D. all of the above
12 If A is a square matrix of order ' n' and lis the unit matrix of the same order then A 1 is equal to.
A. A
B. 1A
C. 1
D. Both a and b
13 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
14 The associative law of union is
A. AU (BUC= (AUB)
B. U C
C. AUB = BUA
D. BUC = BUA
15 The equilibrium price and quantity , given the inverse demand and supply functions.
po = 3q +30 and p s = 2q -5
A. p = 9 and q = 7
B. p = 10 and q = 7
C. p = 9 and q = 8
D. p = 7 and q = 9
16 If A and B are symmetric matrix, then AB- BA is.
A. Symmetric
B. Skew symmetric matrix
C. Idempotent matrix
D. Orthogonal matrix
17 The simplest form of rectangular hyperbola is
A. y = 1/x
B. y = x2
C. y = x-2
D. y = x3
18 Given the demand and supply cautions qo = -8p + 2000 and qs = 12 p - 200 respectively the equilibrium price.
A. p = 100
B. p = 110
C. p = 120
D. p = 140
19 The function y = 2x + 1 and x = 1/2 y - 1/2 are said to be.
A. Non linear functions
B. Inverse functions
C. Step functions
D. All the above
20 "Null set is proper subset of all the non nul sets" this statement is.
A. Always true
B. sometimes true
C. Never true
D. True subject to some conditions

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