Questions
The number of 3 x 3 non-singular matrices, with four entries as 1 and all other entries as 0 is
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a
6
b
at least 7
c
less than 4
d
5
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Correct option is B
The matrix 1 a bc 1 de f 1where exactly one of a, b, c, d, e, f is 1 and rest of them are zeros, is invertible.There are six such matrices.Also, the matrix 1 0 10 1 01 0 0 is invertible.Thus, there are at least 7 such matrices which are invertible.Similar Questions
If is a matrix satisfying the equation then
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