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
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
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
-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)
cuoi nam hoc lop 6a co 3/5 so hs dat loai gioi, 30/100 so hs dat loai kha con lai la 5 hs trung binh. hoi lop 6a co bao nhieu hs?
Mot lop hoc co chua den 50 hs. Cuoi nam xep loai hoc luc gom 3 loai:gioi , kha , TB, trong do 1/16 so hs cua lop xep loai TB, 5/6 so hs cua lop xep loai gioi , con lai xep loai kha.Tinh so hs xep loai kha.
ket qua so ket HK1 cho thay hs kha va gioi chiem 50% so hs ca lop so hs trung binh chiem 2/5 so hs ca lop so con lai la hs yeu Tinh so hs kha va gioi so hs trung binh biet rang lop 6A co 4 hs yeu