What is the order of matrix A?

Question 1

EasyOriginal question

What is the order of $A = \begin{bmatrix}3 & -1 & 0 & 5 \\ 2 & 7 & 4 & -6 \\ 1 & 0 & 9 & 8\end{bmatrix}$ ?

4 \times 3

Correct answerYour answer

3 \times 4

Correct answerYour answer

12

Correct answerYour answer

3 \times 3

Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer B

Correct answer: B

$A$ has 3 rows and 4 columns.
An order is written rows × columns, so the order is $3 \times 4$ . The matrix has 12 elements, but 12 is a count, not an order.

Worth noting

$4 \times 3$ puts the columns first; an order always starts with the rows.

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