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Finding Inverse Using Elementary Transformations

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Find the number of all possible symmetric matrices of order 3*3 with each entry 1 or2 and whose sum of diagonal elements is equal to 5 is

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A

be a symmetric matrix of order

2

with integer entries. If the sum of the diagonal elements of

A^{2}

1,

then the possible number of such matrices is :

Q. Find the number of all possible matrices of order

3 \times 3

with each entry

0

1

Q. Find the number of all possible matrices of order

3 \times 3

with each entry

0

1

A

be a symmetric matrix of order

2

with integer entries. If the sum of the diagonal elements of

A^{2}

1,

then the possible number of such matrices is :

The number of all possible matrices of order $3 \times 3$ with each entry 0 to 1 is
(a)27
(b)18
(c)81
(d)512

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