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Let A be the set of all 3xx3 symmetric m...

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

A

less than 4

B

at least 4 but less than 7

C

atleast 7 but less than 10

D

at least 10

Text Solution

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The correct Answer is:
B
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