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What is the number of different matrices, each having 4 entries that can be formed using 1,2,3 , 4 (repetition is allowed)?

Options

  1. A72
  2. B216
  3. C254
  4. D768

Correct answer

D. 768

Step-by-step solution

Possible order of 4 entries matrices 1 4 , 2 2,4 1 Total number of matrices aligned & =4 4 4 4 3 & =768 aligned

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