A dolamite mixture having the following screen analysis is screened

through a standard 100 mesh screen. Calculate the effectiveness of the screen and the mass

ratios of overflow and underflow to feed.

Mesh 35 48 65 100 150 200 - 200 Feed 7.07 16,60 14.02 11.82 9.07 7.62 33.80 100 Oversize 13.67 32.09 27.12 20.70 4.35 2.07 0.00 100 Undersize (weight %) 0.00 0.00 0.00 2.32 14.32 13.34 70.02 100