Class XII If A and B are two non-zero square matrices such that AB = 0, then none of these. either of them is singular both A and B are singular neither matrix is singular If A is a matrix of order 3 × 4, then each row of A has 12 elements 3 elements 4 elements 7 elements. If P is of order 2 × 3and Q is of order 3 × 2, then PQ is of order 2x2 3x3 2x3 3x2 The system of equations x + 2y = 11,-2 x – 4y = 22 has no solution only one solution infinitely many solutions. finitely many solution If A and B are symmetric matrices of the same order, then AB is symmetric matrix AB – BA is a symmetric matrix A – B is a skew-symmetric matrix AB + BA is a symmetric matrix Do you really want to submit this quiz? Cancel Submit Quiz