EM-2111

Displaying data in matrices

E Math · Secondary 4 · Medium · Displaying data in matrices

A shop sells pens and pencils. On Monday, 150 pens and 90 pencils are sold. On Tuesday, 120 pens and 110 pencils are sold. Represent the numbers sold in a

2\times 2

matrix

S

, where rows are days and columns are items. Which matrix is

S

$\begin{pmatrix}150 & 90\\120 & 110\end{pmatrix}$
$\begin{pmatrix}90 & 150\\110 & 120\end{pmatrix}$
$\begin{pmatrix}150 & 120\\90 & 110\end{pmatrix}$
$\begin{pmatrix}90 & 150\\120 & 110\end{pmatrix}$

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