Is é an grád reatha 70% (nó C-).
Is é meáchan deiridh an scrúdaithe 50%.
Is é an grád riachtanach 80% (nó B-).
Tá an grád deiridh scrúdaithe cothrom leis an ngrád riachtanach, lúide 100% lúide meáchan deiridh an scrúdaithe (w) níos mó ná an grád reatha (g), arna roinnt ar mheáchan deiridh an scrúdaithe (w):
Grád deiridh na scrúduithe =
= ( grád riachtanach - (100% - w ) × grád reatha ) / w
= (80% - (100% - 50%) × 70%) / 50% = 90%
Mar sin ba chóir go mbeadh an grád deiridh scrúdaithe 90% (nó A-).
Sannadh 1: meáchan1 = 50%, grád1 = 16 as 20.
Sannadh 2: meáchan2 = 30%, uas ghrád = 30.
Sannadh 3: meáchan3 = 20%, uas ghrád = 40.
Faigh meán-ghrád i dtascanna 2 agus 3 a theastaíonn chun grád ranga 85% a fháil.
Grád reatha = Sannadh 1 grád = grád1 / uas ghrád1 = 16/20 = 0.8 = 80%
Grád riachtanach = 85%
Meáchan deiridh an scrúdaithe = w = weight2 + weight3 = 30% + 20% = 50%
Grád deiridh na scrúduithe =
= ( grád riachtanach - (100% - w ) × grád reatha ) / w
= (85% - 50% × 80%) / 50% = 90%
Ciallaíonn sé seo go gcaithfidh tú meán-ghrád 90% a fháil i dtascanna 2 agus 3 d’fhonn grád ranga 85% a fháil.
Tasc 2 ghrád = 90% × uas ghrád = 90% × 30 = 27
Sannadh 3 grád = 90% × uas ghrád = 90% × 40 = 36
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