A company surveyed its employees in Department X and Department Y about their preferred day for a weekly team meeting. The number of employees in Department X was three times the number of employees in Department Y. The table below shows the distribution of preferred meeting days, in percent, for each department.
| Department X | Department Y | |
|---|---|---|
| Monday | 40% | 60% |
| Tuesday | 30% | 20% |
| Wednesday | 20% | 10% |
| Thursday | 10% | 10% |
| Total | 100% | 100% |
If an employee who preferred a Monday meeting is selected at random, what is the probability that the employee is from Department X?
