How many milligrams are present in the entire vial?

How many milligrams are present in the entire vial?

• A. 30 mg
• B. 5 mg
• C. 15 mg
• D. 60 mg

Answer: (C)

Total drug in a vial is found by multiplying how strong the solution is (concentration) by how much solution there is (volume). In practice, read the label to get mg per mL and the total milliliters in the vial, then multiply. If the vial is labeled 5 mg per mL and the total volume is 3 mL, you multiply 5 × 3 to get 15 mg in the entire vial. That matches the given answer. Remember, the same method works for any numbers you’re given: total mg = (mg per mL) × (mL). If you ever see a different total, that just means a different concentration, a different volume, or both, were provided.

Total drug in a vial is found by multiplying how strong the solution is (concentration) by how much solution there is (volume). In practice, read the label to get mg per mL and the total milliliters in the vial, then multiply.

If the vial is labeled 5 mg per mL and the total volume is 3 mL, you multiply 5 × 3 to get 15 mg in the entire vial. That matches the given answer.

Remember, the same method works for any numbers you’re given: total mg = (mg per mL) × (mL). If you ever see a different total, that just means a different concentration, a different volume, or both, were provided.