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The number of all possible matrices of o...

The number of all possible matrices of order `3 xx3`with each entry 0 or 1 is:(a) 27 (b) 18 (c) 81 (d) 512

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The number of possible entries of 3×3 matrix is 9.
Every entry has two choices, 0 or 1
Thus, total number of choices is
`2xx2xx2xx2xx2xx2xx2xx2xx2=2^9`
`=512`.
...
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