uses crt;
var i, n, s: integer;
tb: real;
a: array [1..100] of integer;
begin
write('nhap so n:'); readln(n);
for i:=1 to n do
s:= s + a[i];
tb:= s/n;
writeln(' trung binh cua day so la:', tb:4:2);
readln
end.
begin
write('a[',i,']='); readln(a[i]);
end;
for i:=1 to n do
uses crt;
var i, n, s: integer;
tb: longint;
a: array [1..100] of integer;
begin
write('nhap so n:'); readln(n);
for i:=1 to n do
begin
write('a[',i,']='); readln(a[i]);
end;
for i:=1 to n do
s:= s+a[i];
tb:= s/n;
writeln(' trung binh cua day so la: ', tb:4:2);
readln
end.