Microsoft Office Excel 5.ບຸຉຝຶກຣັຉ H9=G9+F9+E9+D9+C9 I9=H9/5 J9=IF(I9>=5,"ເຆ ຄໄຉົ້", IF(I9<5,"ເຆ ຄຊົກ")) K9=RANK(I9,$I$9:$I11) H12=MAX(H9:H11) H13=MIN(H9:H11) H14=COUNTIF(E9:E11,"<=6") H15=COUNTIF(F9:F11,"<5") 61 by Lakhonekham Choumphachane