Tamil Nadu Board of Secondary EducationHSC Commerce Class 11th

# HSC Commerce Class 11th - Tamil Nadu Board of Secondary Education Question Bank Solutions for Business Mathematics and Statistics

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Find the minors and cofactors of all the elements of the following determinant.

|(5,20),(0, -1)|

[0.01] Matrices and Determinants
Chapter: [0.01] Matrices and Determinants
Concept: Determinants

Find the minors and cofactors of all the elements of the following determinant.

|(1,-3,2),(4,-1,2),(3,5,2)|

[0.01] Matrices and Determinants
Chapter: [0.01] Matrices and Determinants
Concept: Determinants

Evaluate |(3,-2,4),(2,0,1),(1,2,3)|

[0.01] Matrices and Determinants
Chapter: [0.01] Matrices and Determinants
Concept: Determinants

Solve: |(2,x,3),(4,1,6),(1,2,7)| = 0

[0.01] Matrices and Determinants
Chapter: [0.01] Matrices and Determinants
Concept: Determinants

Find |AB| if A = [(3,-1),(2,1)] and B = [(3,0),(1,-2)]

[0.01] Matrices and Determinants
Chapter: [0.01] Matrices and Determinants
Concept: Determinants

Solve: |(7,4,11),(-3,5,x),(-x,3,1)| = 0

[0.01] Matrices and Determinants
Chapter: [0.01] Matrices and Determinants
Concept: Determinants

Evaluate: |(1,a,a^2 - bc),(1,b,b^2 - ca),(1,c,c^2 - ab)|

[0.01] Matrices and Determinants
Chapter: [0.01] Matrices and Determinants
Concept: Determinants

Prove that |(1/a,bc,b+c),(1/b,ca,c+a),(1/c,ab,a+b)| = 0

[0.01] Matrices and Determinants
Chapter: [0.01] Matrices and Determinants
Concept: Determinants

Prove that |(-a^2,ab,ac),(ab,-b^2,bc),(ac,bc,-c^2)| = 4a^2b^2c^2

[0.01] Matrices and Determinants
Chapter: [0.01] Matrices and Determinants
Concept: Determinants

Find the amount of an ordinary annuity of ₹ 3,200 per annum for 12 years at the rate of interest of 10% per year. [(1.1)12 = 3.1384]

[0.07] Financial Mathematics
Chapter: [0.07] Financial Mathematics
Concept: Annuities

If the payment of ₹ 2,000 is made at the end of every quarter for 10 years at the rate of 8% per year, then find the amount of annuity. [(1.02)40 = 2.2080]

[0.07] Financial Mathematics
Chapter: [0.07] Financial Mathematics
Concept: Annuities

Find the amount of an ordinary annuity of 12 monthly payments of ₹ 1,500 that earns interest at 12% per annum compounded monthly. [(1.01)12 = 1.1262]

[0.07] Financial Mathematics
Chapter: [0.07] Financial Mathematics
Concept: Annuities

The value of x if |(0,1,0),(x,2,x),(1,3,x)| = 0 is

[0.01] Matrices and Determinants
Chapter: [0.01] Matrices and Determinants
Concept: Determinants

The value of |(2x + y,x,y),(2y+z,y,z),(2z+x,z,x)| is

[0.01] Matrices and Determinants
Chapter: [0.01] Matrices and Determinants
Concept: Determinants

The cofactor of –7 in the determinant |(2,-3,5),(6,0,4),(1,5,-7)| is

[0.01] Matrices and Determinants
Chapter: [0.01] Matrices and Determinants
Concept: Determinants

A bank pays 8% per annum interest compounded quarterly. Find the equal deposits to be made at the end of each quarter for 10 years to have ₹ 30,200? [(1.02)40 = 2.2080]

[0.07] Financial Mathematics
Chapter: [0.07] Financial Mathematics
Concept: Annuities

If Delta = |(1,2,3),(3,1,2),(2,3,1)| then |(3,1,2),(1,2,3),(2,3,1)| is

[0.01] Matrices and Determinants
Chapter: [0.01] Matrices and Determinants
Concept: Determinants

A person deposits ₹ 2,000 at the end of every month from his salary towards his contributory pension scheme. The same amount is credited by his employer also. If 8% rate of compound interest is paid, then find the maturity amount at end of 20 years of service. [(1.0067)240 = 4.9661]

[0.07] Financial Mathematics
Chapter: [0.07] Financial Mathematics
Concept: Annuities

Find the present value of ₹ 2,000 per annum for 14 years at the rate of interest of 10% per annum. If the payments are made at the end of each payment period. [(1.1)–14 = 0.2632]

[0.07] Financial Mathematics
Chapter: [0.07] Financial Mathematics
Concept: Annuities

Find the present value of an annuity of ₹ 900 payable at the end of 6th month for 6 years. The money compounded at 8% per annum. [(1.04)–12 = 0.6252]

[0.07] Financial Mathematics
Chapter: [0.07] Financial Mathematics
Concept: Annuities
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