SOLUTION: Suppose A is a 3×5 matrix, B is a 5×s matrix and C is a 5×5 matrix. If A (BC)Transpose is defined, then the size of B is?

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Question 891944: Suppose A is a 3×5 matrix, B is a 5×s matrix and C is a 5×5 matrix. If A (BC)Transpose is defined, then the size of B is?
Answer by Fombitz(32388) About Me  (Show Source):
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5x5
Since BC is valid operation, and C is a 5x5 matrix, B must also be a 5x5 matrix