How many 3 × 3 matrices M with entries from 0, 1, 2 are there, for which the sum of the…
Mathematics · JEE Advanced · NTA Exams — Matrices and Determinants
How many 3 × 3 matrices M with entries from {0, 1, 2} are there, for which the sum of the diagonal entries MTM is 5?
- 162
- 135
- 126
- 198
Answer
(C) 126
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