lop 5a co 1/8 so hs la hs gioi ,1/ 2so hs la hs kha ,con lai la hoc sinh trung binh . hoi hs trung binh chiem bao nhieu phan tramso hs ca lop

mot lop co 40 hs gom 3 loai gioi kha trung binh trong do 30% tong so la hs gioi shs gioi =4/7 hs kha con lai la hs tb tinh moi loai tinh ti so phan tram so hoc sinh tb so voi so hs ca lop

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 5a co so hs gioi bang 3phan 5 tong so hs so hoc sinh kha bang 1 phan 2 so hoc sinh gioi, con lai la 5 hoc sinh trung binh

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 1/2 so hoc sinh xep loai hoc luc gioi, 1/3 so hoc sinh xep loai hoc luc kha con lai la hoc sinh xep loai hoc luc trung binh. Hoi lop 5A co bao nhieu hoc sinh xep loai hoc luc gioi?Biet tong so hoc sinh xep loai gioi va kha la 30 ban.

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

Lop 5a co 40 hs , trong do co 7/10 hs loai kha,2/10 so hs dat loai gioi,con lai la hs dat loai trung binh.Hoi  lop co bao nhieu hs loai trung binh