khoi nam cua truong co 120 hs trong do co 72 hs la nu hoi so hs nu cua khoi nam chiem bao nhieu phan tram tong so hs cua ca khoi

Khoi lop 6 cua 1 truong co 400 HS. Trong do so HS gioi chiem 3/8. Tong so HS gioi do, so HS nu chiem 40%. Tinh so hoc sinh nu cua khoi 6 dat loai gioi

1,hk1 so hsg  lop 6a =1/4 so con lai.cuoi ki 2co them 2 hsg nen so hsg=1/3 con lai .hoi lop 6a co bn hs

2,khoi 6 cua mot truong co 300hs,trong do co 40 hsg trong so hsg do so nu chiem 2/3 .tinh so hs nu cua khoi 6 dat loai gioi

khoi lop 5 cua mot truong tieu hoc co 320 hs .trong do hs nu chiem  45% .tim so hs nam 

lam dung roi tich cho

Cuoi nam 2010-1011,khoi 5 cua mot truong tieu hoc co so hsg chiem ty le 40% so voi hs ca khoi. so hoc sinh kha chiem 36 %

so hoc sinh ca khoi,so hoc sinh trung binh chiem 1/5 so hoc sinh ca khoi ,con  lai la 1 em chua hoan thanh chuong trinh tieu hoc .hoi hoc sinh khoi 5 truong do co tat ca bao nhieu hs

Nho cac ban giup minh

khoi lop 5 cua truong tan  tien co 3 lop . so hs cua lop 5a bang 3/8 so hs cua khoi , so hs cua lop 5b bang 2/3 so hs cua loi 5a , lop 5c co 45 hs. khoi lop 5 cua truong tan tien co bao nhieu hoc sinh

3/ tim so hoc sinh khoi 6 cua 1 truong thcs. biet so hs nu chiem \(\frac{3}{5}\) so hs khoi 6 cua truong la 162 em

hoc sinh truong THCS Thăng Long tham gioa hoi khoe phu dong. trong do co 4/15 la hoc sinh khoi 9, so hoc sinh khoi lop 7 bang 1/4 tong so hoc sinh cua ba khoi lop con lai, hoc sinh cua khoi lop 8 bang 5/7 tong so hoc sinh khoi lop 7 va lop 9. khoi lop 6 co 30 hoc sinh. Tinh so hoc sinh cua truong va cua moi khoi lop tham gia hoi khoe phu dong

KHOI LOP 4 CUA MOT TRUONG TIEU HOC CO 4 LOP , TRUNG BINH MOI LOP CO 28 HOC SINH . SO HOC SINH NAM CUA KHOI BANG 3/ 4 SO HOC SINH NU HOI KHOI LOP 4 CUA TRUONG DO CO BAO NHIEU HOC SINH NAM, BAO NHIEU HOC SINH NU ?