b) so hs nam la :
1210 : (5 + 6 ) x5 = 550 ( hs )
so hs nu la ;
1210 - 550 = 660 (hs )
so hs toan truong la 11 phan . vay so hs nu = 6/11 hs toan truong , so hs nam = 5/11 hs toan truong
k va kb voi minh nha . minh lam cho ban dau tien day . chuc ban hoc gioi ~~