Question

copy central prints black and white or colored copies. Yesterday, they printed 9 black and white copies for every 2 colored copies. If they printed 200 color copies, how many black and white copies were printed

Answer 1

$\bf \cfrac{bw}{color}\qquad 9:2\qquad \cfrac{9}{2}\qquad \qquad \cfrac{bw}{200}=\cfrac{9}{2}\implies bw=\cfrac{200\cdot 9}{2}$

Answer 2

Answer:

900.

Step-by-step explanation:

We have been given that copy central prints black and white or colored copies. Yesterday, they printed 9 black and white copies for every 2 colored copies.

We will use proportion to solve the given problem as:

$\frac{\text{Black and white copies}}{\text{Colored copies}}=\frac{9}{2}$

Substitute the given values:

$\frac{\text{Black and white copies}}{200}=\frac{9}{2}$

$\frac{\text{Black and white copies}}{200}*200=\frac{9}{2}*200$

$\text{Black and white copies}=9*100$

$\text{Black and white copies}=900$

Therefore, 900 black and white copies were printed.