Explanation:

- Initial Calculations:

- The mean of 12 numbers is 25, so the total sum of these numbers is $12\times 25=300$.

- After Exclusion:

- After excluding one number, the mean of the remaining 11 numbers is 22. Thus, the sum of these 11 numbers is $11\times 22=242$.

- Finding the Excluded Number:

- The excluded number can be found by subtracting the sum of the 11 numbers from the sum of all 12 numbers: $300-242=58$.

- Options:

- Option 1: 52

- Option 2: 50

- Option 3: 58

- Option 4: 48