A veterinary pharmaceutical company technician uses a 480-mL flask of rabies vaccine solution to fill individual vials. If each vial holds 1/30 of the volume of the flask, how many mL of vaccine are in each vial?

• A. 18 mL
• B. 16 mL
• C. 14 mL
• D. 12 mL

Answer: (B)

The problem tests finding a fraction of a total quantity. If each vial holds one-thirtieth of the flask’s volume, you multiply the total volume by 1/30. So you compute 480 mL × (1/30), which equals 480 ÷ 30 = 16 mL. A quick check confirms this makes sense: 30 vials × 16 mL each = 480 mL, matching the flask.