EM-2121

Matrix multiplication

E Math · Secondary 4 · Hard · Matrix multiplication

A zoo records the average number of adults, youths and seniors visiting on a weekday and a weekend as

yWeekday:

\begin{bmatrix}180 & 320 & 140\end{bmatrix}

Weekend:

\begin{bmatrix}420 & 600 & 160\end{bmatrix}

This is represented by matrix

Z = \begin{bmatrix}180 & 320 & 140\\420 & 600 & 160\end{bmatrix}

.

Ticket prices for an adult, youth and senior are \$30, \8 and \2 respectively.

Represent the prices by a

3\times 1

matrix

P

and find

T = ZP

. What is

T

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