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Q.

The number of all possible matrices of order 3 × 3 with each entry 0 or 1 is 

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a

512

b

81

c

18

d

None of these

answer is B.

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Detailed Solution

There are in total 9 entries and each entry can be selected in exactly 2 ways. Hence, the total number of all possible matrices of the given type is 29.

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