If A is a matrix of order 3 × 3,
Question:

If $A$ is a matrix of order $3 \times 3$, then the number of minors in $A$ is________

Solution:

A is a matrix of order 3 × 3
⇒ A has 9 elements
⇒ A has 9 minors

Hence, the number of minors in A is 9.

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