Give this a go in K4:
=INDEX('Grade determination'!$B$3:$B$17,MATCH(ROUND(SUMPRODUCT(((SUBSTITUTE(H4:J4,"N","")<>""))*({0.4,0.4,0.2})*('Grade determination'!$B$3:$B$17=H4:J4)*('Grade determination'!$C$3:$C$17))*(1/SUMPRODUCT((H4:J4<>"")*(H4:J4<>"N")*({0.4,0.4,0.2}))),0),'Grade determination'!$C$3:$C$17,0))
Bookmarks