-0,6 x X - 7/3 = 5,4

2,8 : (1/5 - 3 x X) = 1 2/5

lop 6a co 3 loai hs gioi kha va trung binh. trong do 2/3 so hs gioi la 8 em. so hs gioi bang 80% so hs kha. so hs trung binh bang 7/9 tong so hs kha va hs gioi tim so hs cua lop

tinh gia tri cua bieu thuc sau: a= 7/4 x (3333/1212 + 3333/2020 + 3333/3030 + 3333/4242)

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

Mot lop co 42 hs gom 3 loai: kha, gioi, trung binh. Biet so hs trung binh bang 3/2 so hs kha va so hs kha bang 2 lan so hs gioi. Tinh so hs moi loai cua lop do

Lop 6A co 32 HS. Cuoi ki duoc xep 3 loai la gioi , kha va trung binh. Trong do so HS gioi chiem 25 % so HS ca lop. So HS trung binh bang \(\frac{1}{3}\) so HS con lai

a) Tinh so HS gioi, kha va trung binh cua lop do.

b) Tinh ti so phan tram cua so HS trung binh so voi so HS ca lop

ai nhanh cho 1 like

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

lop 5a co so hoc sinh gioi =0,75 so hs kha sau do co hs gioi lop 5b chuyen sang nen so hs gioi=0,8 so hs kha tinh so hs kha luc dau cua lop 5a

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 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