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There are Eight persons in this floor arrangement. They are Ram, Shyam, Tina, Rohit, Lalit, Deepak, Aman, and Ajay.
According to the question, We will focus on these statements to solve the question efficiently.
1. Tina lives on an even number of floors.
2. Three people live between Tina and Rohit’s floor.
3. One person lives between Deepak and Rohit’s floor, whereas Deepak lives below Rohit’s floor.
4. Shyam lives on the seventh floor.
Even number floors are 2, 4, 6, 8. If we place Tina on the sixth floor then the condition that Deepak lives below Rohit's floor is not possible. Therefore, we would not consider the case where Tina lives on floor number 6.

5. Aman lives below Deepak but does not live on the lowermost floor.
6. Aman does not sit adjacent to Deepak.
In Case 1 the possible position for Aman could be floor 3 and 1. But then on floor number 3, the Aman will be adjacent to Deepak and on floor number 1 the Aman will be on the lowermost floor. Therefore, the case 1 will be eliminated.
As Aman lives below Deepak but does not live on the lowermost floor the only possible position available for Aman is the lowermost floor according to the given condition. Therefore, the case -3 will be eliminated.
Because of the conditions, Case 1 and Case 3 will be eliminated.

7) Three people live between Lalit and Ajay, where Lalit lives below Ajay.
8) Ram floor is above Aman floor.
If we place Lalit and Ajay in Case 2(i) then the only place left for Ram would be floor number 2. But then the Ram will be below the floor of Aman floor and this will contradict the given conditions. Therefore, Case 2(i) is eliminated.
The final arrangement is:

Ajay lives immediately below Deepak's floor. Similarly, Lalit lives immediately below Aman's floor.