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Question
If A and B are two matrices of order 3 × m and 3 × n respectively and m = n, then the order of 5A − 2B is
Options
m × 3
3 × 3
m × n
3 × n
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Solution
Since, the order of both A and B are same.
i.e., 3 × m or 3 × n.
Therefore, the order of 5A − 2B is also 3 × m or 3 × n.
Hence, the correct option is (d).
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