Number of rows in matrix A times number of columns in A x B should equal:
ARows of B
BColumns of B
CNumber of cols of A = rows of B
DAlways equal
Answer & Solution
Correct answer: C. Number of cols of A = rows of B
For matrix product A x B to be defined, columns of A must equal rows of B. Result has rows of A and cols of B.
Related questions
If A is a 3×3 matrix with det(A) = 5, then det(2A) isDeterminant of a 2×2 matrix [[a,b],[c,d]] equalsIf A is invertible, then A × A⁻¹ equalsA matrix with the same number of rows and columns is calledIf A is invertible 2 × 2 and A² = I then A isDeterminant of a triangular matrix equalsA square matrix A is called symmetric ifIf A and B are square matrices of same order, in general