An emergency room (ER) nurse noticed that there are an unusually high number of motor-vehicle accident injuries in the month of December. She pulled 1000 random ER patient files from December and found that 120 of those patients were admitted due to motor-vehicle injuries. Based on this information, the nurse can estimate that _[blank]_ patients of the total 40,000 ER patients seen in December were admitted due to motor-vehicle injuries. Enter your answer as the number that correctly fills in the blank in the previous paragraph