ti so giua hoc sinh nam va hoc sinh cua ca lop 6a la 2/5.sau khi co 4 hs nam chuyen sang lop khac thi ti so giua hs nam va hs ca lop la 1/3.tinh so hs nam luc dau

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

ti so hs 2 lop la 2/3.Neu tang so hs 6a them 8 hs va 6b them 4 hs thi ti so hs 6a va 6b la 3/4.Hoi moi lop co bao nhieu hs

giup mn nha

ai nhanh mn k cho

lop 5B co so hs gioi nhieu hon 1/5 so hs cua lop la 3 em. So hs con lai nhieu hon 1/2 so hs cua lop la 9 em. Tinh

a) So hs gioi lop 5B.

b) So hs lop 5B

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

Tog so hoc sih cua hai lop 4a va 4b la 60 hs . Neu chuyen 3 hs tu lop 4a sag lop 4b thi so hs 2 lop bah nhau . Hoi moi lop co bao nhieu hs?

lop 5a co so hs nu bang 2/3so hsnam .Neu 2 ban nu chuyen di va thay vao do la 2 ban nam thi so hs nu bang 4/7 hs nam .Tinh so hs lop 5a

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

cuoi hoc ki 2 lop 6a co 3 loai hs:gioi,kha,TB.so hsg=5/4 so hs kha va tb.so hs kha=1/3 so hs ca lop.so hs tb la 5 em.tinh so hs lop 6a;so hsg;so hs kha.