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The number of all possible matrices of order 2 × 2 with each entry 'a', 'b' or 'c' is: |
81 256 12 3 |
81 |
The correct answer is Option (1) → 81 No. of entries possible = 3 No. of cells = $2×2=4$ So total no. of matrices = combination of all cells = $3^4=81$ |
