const n=10;

var a: array[1..n] of integer;

s,i: integer;

begin

Randomize;

for i:=1 to n do

 begin

 a[i]:=random(50);

 write(a[i],' ');

 end;

writeln;

s:=0;

for i:=1 to n do s:=s+a[i];

writeln(s/n:5:2);

end.