The probability of occupancy for a state whose energy is 0.1 eV above the fermi energy is f(E)=0.190
The probability of occupancy for a state whose energy is 0.1 eV below the fermi energy is f(E)=0.810
The probability of occupancy for a state whose energy is 0.1 eV and  equal to the fermi energy is f(E)=0.500 