coui hoc ki 1 hs lop 5a deu dat luc hoc kha hoac gioi trong do so hs gioi chiem 60 % so hs kha nhung chi tieu phan dau cua lop la cuoi nam so hs gioi dat 60 % do do so voi cuoi ki lop 5a phai co them 9 hs nua dat hoc luc gioi hoi lop 5a co bao nhieu hs biet rang trong ca nam hoc lop 5a khong co thay doi ve si so

cuoi hoc ki 1 lop 5a co so hs gioi bang 2/5 so hoc sinh kha sang hoc ki 2 do co gang nen them 5 ban nua dat loai gioi luc nay so hoc sinh gioi bang 2/3 so hoc sinh kha tinh so hs moi loai moi loai cuoi nam biet rang lop khong co hoc sinh trung binh va yeu

lop 6a co 3 loai hoc sinh gioi, kha,tb. hs gioi chiem 4/5 so hs kha va tb. so hs kha =1/3 hs ca lop.biet so hs tb la 5 em. tinh so hs ca lop, hs gioi, kha

Cuoi nam hoc xep loai hoc luc cua lop 6A co 3 loai: gioi, kha, trung binh. Trong do loai gioi chiem 18,75℅ tong so hs ca lop, loai kha bang 300℅ loai gioi, loai trung binh co 12 em. Tinh so hs cua lop 6A.

lop 5b cuoi hocj ky 2 co 3 loai hs gioi, kha, trung binh. so hs gioi bang 3/5 so hs  ca lop. so hs kha it hon 3/5 so loai trung binh la 2 em. tinh so hs gioi , kha cua lop biet so hs trung binh la 15em

Lop 6B co 45 HS hoc luc duoc chia lam 3 loai: Gioi, kha, trun binh. So HS trung binh chiem \(\frac{2}{9}\)so HS ca lop, so HS kha bang 60% so HS con lai

a) Tinh so HS moi loai

b) Tinh ti so giua cac HS gioi va HS trung binh

c) So HS gioi chiem bao nhieu phan tram hoc sinh cua ca lop?

lop 7a co so hs gioi = 3/8 so hs kha. den cuoi nam co 7 hs vuon len hs gioi va 1 hs tut xuong hs kha nen so hs gioi = 9/13 so hs kha. hoi lop 7a co bn hs

lop 7a co so hs gioi = 3/8 so hs kha. den cuoi nam co 7 hs vuon len hs gioi va 1 hs tut xuong hs kha nen so hs gioi = 9/13 so hs kha. hoi lop 7a co bn hs

lop 6a co 45hs ,ket thuc ki 1 gom 3loai hs gioi kha tb . biet rang ti so giua hs gioi va kha la 3/5 . sang hoc ki 2 co 1hs duoc len loai gioi nen ti so giua hs gioi va kha la 2/3. tinh so hs moi loai hoc ki 1