F-Score

(F1 score) is the harmonic mean of Precision and Recall. $F_1=\frac{2}{{\mathrm{recall}}^{-1}+{\mathrm{precision}}^{-1}}=2\frac{\mathrm{precision}\cdot \mathrm{recall}}{\mathrm{precision}+\mathrm{recall}}=\frac{2\mathrm{TP}}{2\mathrm{TP}+\mathrm{FP}+\mathrm{FN}}$