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

The equilibrium price and quantity , given the inverse demand and supply functions.
po = 3q +30 and p s = 2q -5

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

A function where a variable x can only very in jumps, is often called.

Question # 6

If B is a subset of A, then AUB =

Question # 7

Who is regarded as the founder of theory of sets.

Question # 8

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

Question # 9

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

Question # 10

If two sets contain the same distinct elements, then they are called.

Question # 11

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

Question # 12

A set continuing no elements is called.

Question # 13

For any square matrix a of order 'n'a (Ad)A) is equal to.

Question # 14

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

Question # 15

The set of all elements belonging to A but not to B is.

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

Given or known values in an equation are called.

Question # 20

Union of A with A, that is A U A.

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Sr.# Question Answer
1 A matrix with all elements zero other than all the diagonals is called.
A. Diagonal matrix
B. Orthogonal matrix
C. Unit matrix
D. Column vector
2 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
3 The sufficient condition required for the matrix to posses inverse is that the matrix should be.
A. square matrix
B. Singular matrix
C. Non singular matrix
D. Orthogonal matrix
4 A possible use in economies for the circle of the ellipse is to model.
A. Production possibility curve
B. Demand curve
C. Iosco line
D. Supply curve
5 The determinant of a matrix and that of its transpose are
A. Equal
B. Zero
C. One
D. Negatively related
6 A set totality of elements from all possible sets is called.
A. Union set
B. Intersection set
C. Universal set
D. Unit set
7 If the determinant formed by the elements of the matrix A is equal to zero, then the matrix is.
A. Skew symmetric
B. Singular
C. Symmetric
D. Non singular
8 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
9 The slope of a horizontal line is.
A. One
B. Zero
C. Three
D. two
10 The set of subsets of a set A is called.
A. Power set of A
B. Complement of A
C. Both a and b
D. None of these

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