Multiple choice Infuse 500 ml LR at 50 ml/hr. Drop factor 20 gtts/ml. Solve for gtts/min. 20 gtts/min 17 ml/hr 20 ml/hr 17 gtts/min Reveal answer Fill a bubble to check yourself D Correct answer Explanation The formula is (Volume in ml * Drop factor) / Time in minutes. Here, (50 ml * 20 gtts/ml) / 60 minutes = 1000 / 60 = 16.66, which rounds to 17 gtts/min.