PascalABC
const
n = 10;
type
mas = array [1..n] of integer;
procedure SrM(a : mas; var b : real);
var i : integer;
S : integer;
begin
s := 0;
for i := 1 to n do
S := S + a[i];
b := S / n;
end;
var
a : mas;
i : integer;
Sr : real;
begin
for i := 1 to n do
a[i] := -10 + random (20);
SrM (a,Sr);
writeln (Sr:3:2);
end.