Arithmetic Reasoning

4. A duplicator can make 75 copies of a letter per minute, and 300 copies from one master. After how long must the master sheet be changed?

a. 4 minutes

b. 5 minutes

C. 6 minutes

d. 15 minutes

a. 4 minutes

Step-by-step explanation:

Since the duplicator makes 75 copies a minute, and can only make 300 copies from one master, we divide 300 copies by 75 copies, leaving us with four. So our answer is that the master sheet must be changed every 4 minutes.