How many 3xx3 matrices M with entries fr...

How many `3xx3` matrices `M` with entries from `{0,1,2}` are there, for which the sum of the diagonal entries of `M^T Mi s5?` 126 (b) 198 (c) 162 (d) 135

A

198

B

162

C

126

D

135

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A

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