2/3soHS xe 1 =3/4so HS xe 2= 4/5 so HS xe 3 suy ra 12/18 so HS xe 1 = 12/16 so hs xe 2 = 12/15 so hs xe3 suy ra 1/18 so hs xe 1 = 1/16 so hs xe2 va bang 1/15 so hs xe 3

ta coi so hoc sinh xe 1 la 18 phan , so hs xe 2 la 16 phan nhu the , so hs xe 3 la 15 phan nhu the

xe 1 cho so hoc sinh la

147/ (18+16+15) * 18 =54 (HS)

xe 2 cho so HS la

147/(18+16+15)*16=48(HS)

Xe 3 cho so HS la

147-(54+48)=45 (hs)

dap so xe 1 :54hs

xe2 :48hs

xe3:45hs