Question

If a matrix a3x3 has element either 1, 2 or 5, then find number of possible matrices

Answer 1

number of possible matrices = 3! x 3! x 3! x 3! x 3! x 3! x 3! x 3! x 3!
= 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6  = 36 x 36 x 36 x 36 x 6 =  16,79,616 x 6 

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