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Let S be the set of matrices of order 3x...

Let S be the set of matrices of order `3xx3` such that all elemtns of the matrix belong to `{0,1}`
let `E_(1)={A in S:|A|=0}` where |A| denotes determinant of matrix A
`E_(2)={A in S:` sum of elements of `A=7`} find `P(E_(1)//E_(2))`

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