If {A} and {B} are two matrices such than {AB} is of order {n} \times {n}, then which one of the following is correct? [NDA-I 2021]

Correct Answer is : Orders of A and B need not be the same.

A and B should be square matrices of same order.

Either A or B should be a square matrix.

Both A and B should be of same order

Orders of A and B need not be the same.

UPSC NDA I 2021 Mathematics Solved Paper

Question : 56 of 120

Marks: +1, -0

If A and B are two matrices such than AB is of order n×n, then which one of the following is correct?

[NDA-I 2021]

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