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

(a) m × 3
(b) 3 × 3
(c) m × n
(d) 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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Similar questions

If A and B are two matrices of the order 3 $\times m$ and 3 $\times$ n respectively and m = n, then order of matrix (5A - 2B) is
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(d) $3 \times n$

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(b) m = 3, n = 2
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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 (a) m × 3 (b) 3 × 3 (c) m × n (d) 3 × n

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).

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

(a) m × 3
(b) 3 × 3
(c) m × n
(d) 3 × n

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).