The difference in the number of coulombic exchange pairs for high spin and low spin d⁵ ion in an octahedral complex according to crystal field theory is____

High spin 3 ${\mathrm{t}}_{2\mathrm{g}}^3{\mathrm{eg}}^2$
Total exchange pairs $\left({\mathrm{t}}_{2\mathrm{g}}^3=3\text{ and }{\mathrm{eg}}^2=1\right)=4$
low spin ${\mathrm{t}}_{2\mathrm{g}}^5{\mathrm{eg}}^0$ the three parallel (clock wise spin) electrons have 3 exchange pairs While the  remaining 2 have one exchange pair.