To find the temperature at 11:00 P.M., you need to subtract the temperature drop from the temperature at 4:00 P.M.
Starting with the temperature at 4:00 P.M., which is 12°C:
- The temperature drop is 14°C.
Now, do the calculation:
\[ 12°C - 14°C = -2°C \]
Therefore, the temperature at 11:00 P.M. was -2°C.