5. A combination lock has 50 numbers on it. To open it, you tum it counterclockwise to the 1" number, then clockwise to the 2md number, then lastly counterclockwise to the 3rd number. Repetitions are...

Extracted text: 5. A combination lock has 50 numbers on it. To open it, you tum it counterclockwise to the 1" number, then clockwise to the 2md number, then lastly counterclockwise to the 3rd number. Repetitions are allowed. How many possible combinations are there?