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Let A be the set of all 3 xx 3 symmetri...

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

A

12

B

6

C

9

D

3

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

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