Let A be the set of all `3xx3` symetric matrices whose entries are either 0 or 1. The number of elements is set A, is

Let A be the set of all 3xx3 matrices of whose entries are either 0 or 1. The number of elements is set A, is

Let A be the set of all 3 xx 3 symmetric matrices all of whose entries are either 0 or 1. Five of these entries are 1 and four of them are 0. The number of matrices in A is

Let A be the set of all 3xx3 skew-symmetri matrices whose entries are either -1,0, or 1 If there are exactly three os three 1s, and there (-1)'s, then the number of such matrices is

Let A be the set of all 3xx3 symmetric matrices all of whose either 0 or 1. Five of these entries are 1 and four of them are 0. The number of matrices A in A for which the system of linear equations A[(x),(y),(z)]=[(1),(0),(0)] has a unique solution is

Let A be the set of all 3xx3 symmetric matrices all of whose either 0 or 1. Five of these entries are 1 and four of them are 0. The number of matrices A in A for which the system of linear equations A[(x),(y),(z)]=[(1),(0),(0)] is inconsistent is