Mathematics For Economic Analysis Set 5

Bachelor of Arts in Economics (BA Economics)

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This set of Mathematics for Economic Analysis Multiple Choice Questions & Answers (MCQs) focuses on Mathematics For Economic Analysis Set 5

Q1 | AA-1= ----- = A-1A
  • i
  • a
  • a2
Answer: i
Q2 | If the number of elements of the two sets are equal, then they are called
  • equal set
  • equivalent set
  • order set
  • subset
Answer: equivalent set
Q3 | If a set has three elements, then its power set consist of ----- elements
  • 3
  • 5
  • 6
  • 8
Answer: 8
Q4 | The set of all elements which belong to set B but do not belong to set A is
  • aub
  • a-b
  • b-a
  • acb
Answer: b-a
Q5 | Given A in 2x2 and B is 2x4, then the matrix AB will be of the order
  • 2x2
  • 2x4
  • 4x2
  • 1x2
Answer: 2x4
Q6 | If the matrix CxC =C, the matrix C is
  • square matrix
  • triangular matrix
  • idempotent matrix
  • identity matrix
Answer: identity matrix
Q7 | Maximum number of linearly independent rows and columns of a matrix iscalled
  • rank
  • adjoint
  • determinant
  • inverse
Answer: rank
Q8 | Determinant of a 3X3 square matrix is called ----- determinant
  • first order
  • second order
  • third order
  • fourth order
Answer: third order
Q9 | The set consisting of all the elements which belong to A as well as B is called
  • union
  • intersection
  • complement
  • partition
Answer: intersection
Q10 | The total number of elements of the set of all possible outcome when twocoins are tossed
  • 2
  • 3
  • 4
  • 6
Answer: 4
Q11 | If the relation is defined as from A to B, then relation from B to A
  • relation
  • inverse relation
  • function
  • binary
Answer: inverse relation
Q12 | Special type of relation is
  • function
  • binary relation
  • inverse
  • none of the above
Answer: function
Q13 | Rectangular array of numbers, variables or parameters is called
  • set
  • exponents
  • matrix
  • function
Answer: matrix
Q14 | When A = {0}, the set A is
  • null.
  • equal
  • singleton
  • all of the above
Answer: singleton
Q15 | Given A={a,b,c} and B={a,d,c}, then AUB will be
  • a,b,c
  • a,d,c
  • c,d,a
  • a,b,c,d
Answer: a,b,c,d
Q16 | in a square matrix, the elements lie from left top to right bottom is
  • diagonal elements
  • row elements
  • column elements
  • triangular elements
Answer: diagonal elements
Q17 | if all the elements below the leading diagonal are zero in a square matrix, it is
  • lower triangular matrix
  • identity matrix
  • inverse matrix
  • upper triangular matrix
Answer: identity matrix
Q18 | conformity condition for matrix addition is that matrices should be
  • square
  • same order
  • equal
  • proportional
Answer: same order
Q19 | commutative law of matrix subtraction is
  • a+b=b+a
  • a-b=b-a
  • a-b= -b+a
  • a+b=a-b
Answer: a-b= -b+a
Q20 | In matrix algebra (AB)C=A(BC) is
  • associative
  • commutative
  • distributive
  • none of the above
Answer: associative
Q21 | In matrix expression of linear equation, AX=B, X denotes
  • coefficient matrix
  • constants
  • identity matrix
  • solution vector
Answer: solution vector
Q22 | Given the demand curve, P=20-0.2Q, the revenue curve will be
  • 20-0.2q
  • 10-.1q
  • 20q-0.2q
  • 20q-0.2q2
Answer: 20q-0.2q2
Q23 | If the demand curve is linear and negatively sloped, the marginal revenuecurve has a slope
  • negative
  • positive
  • infinite
  • none of the above
Answer: negative
Q24 | The slope of isocost line is the ratio of
  • quantities
  • input prices
  • costs
  • product prices
Answer: input prices
Q25 | The line of linear equation should begin from
  • the origin
  • x axis
  • y axis
  • any of the above
Answer: any of the above
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