Office Depot prints black and white or colored copies. Yesterday, they printed 9 black and white copies for every 2 colored copies if they print 200 color copies how many black and white copies were printed?

900 black and white copies were printed.

Step-by-step explanation:

From the information provided, you know that they printed 9 black and white copies for every 2 colored copies and you can use a rule of three to find the amount of black and white copies that were printed if they printed 200 color copies:

9 black and white → 2 colored

             x               ← 200 colored

x=(9*200)/2=900

According to this, the answer is that 900 black and white copies were printed.