stack segment
stack ends

data segment

  temp1 dw 2h
  temp2 dw 2h
  avg1 db 2h
  temp3 db ?

data ends


code segment


   assume cs:code,ds:data

   start:
      mov ax,data      
      mov ds,ax        

      mov ax,temp1      
      add ax,temp2

      div avg1          
      mov temp3,al      

      mov ax,4c00h     
      int 21h

code ends               
  end start