(Solved): Coagulated water containing the distribution of particles shown below enter a sedimentation basin ...

Coagulated water containing the distribution of particles shown below enter a sedimentation basin with an overflow rate of $$1000\mathrm{gpd}{\mathrm{ft}}^2$$. Calculate the removal efficiency based on total particle numbers $$\left(?=\frac{N_1?N_c}{v_e}\times 100\%\right)$$, i.e., the fraction removed of the total 260 particles. ( 5 pts)