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MCQ Questions Class 12 Matrices with Answers - Set - 4
then A² is equal to
Question 2:
If A and B are two matrices of the order 3 × m and 3 × n, respectively, and m = n, then the order of matrix (5A – 2B) is
(a) m × 3
(b) 3 × 3
(c) m × n
(d) 3 × n
Correct Answer – (D)
Question 3:
Total number of possible matrices of order 3 × 3 with each entry 2 or 0 is
(a) 9
(b) 27
(c) 81
(d) 512
Correct Answer – (D)
Question 4:
If 
then (x, y) is
(a) (-1, 2)
(b) (-1, -2)
(c) (-2, -1)
(d) (1, -2)
Correct Answer – (A)
Question 5:
The matrix 
(a) a symmetric matrix
(b) a skew-submetric matrix
(c) a diagonal matrix
(d) None of these
Correct Answer – (D)
MCQ Questions Class 12 Matrices With Answers
then A – B equal toQuestion 7:
If 
then the value of x, y is
(a) 3, 1
(b) 2, 3
(c) 2, 4
(d) 3, 3
Correct Answer – (B)
Question 8:
The matrix P = 
is
(a) square matrix
(b) diagonal matrix
(c) unit matrix
(d) None of these
Correct Answer – (A)
Question 9:
If a matrix is both symmetric matrix and skew symmetric matrix then
(a) A is a diagonal matrix
(b) A is zero matrix
(c) A is scalar matrix
(d) None of these
Correct Answer – (B)
Question 10:
If 
and A² = 
then
(a) α = a² + b², β = ab
(b) α = a² + b², β = 2ab
(c) α = a² + b², β = a² – b²
(d) α = 2ab, β = a² + b²
Correct Answer – (B)
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