Answer:
The algorithm:
Input days
sum = 0
for i = 1 to 
    input text
    sum = sum + text
end for
average = sum/days
print average
The program in pascal:
var days, sum, text, i:integer;
var average : real;
Begin
     write ('Days: '); readln(days);
     sum:=0;
     for i := 1 to  do
 do 
          write ('Text: ');  readln(text);  
          sum:=sum+text;
     end;
     average := (sum/days);
     writeln ('The average text is' , average);
End.
Explanation:
This declares all variables
var days, sum, text, i:integer;
var average : real;
This begins the program
Begin
This gets the number of days from the user
     write ('Days: '); readln(days);
Initialize sum to 0
     sum:=0;
This iterates through the days
     for i := 1 to  do begin
 do begin
This gets the text for each day
          write ('Text: ');   readln(text);  
This sums up the texts
          sum:=sum+text;
End loop
     end;
Calculate average
     average := (sum/days);
Print average
     writeln ('The average text is' , average);
End program
End.