Aritmetický průměr - příklady ze statistiky

Vypočtěte aritmetický průměr souboru:
{55, 52, 98, 69, 31, 95, 4, 80, 22} =
{71, 28, 41, 72, 5, 81, 96, 50, 39, 25} =
{26, 61, 71, 26, 66, 88, 17, 52, 50} =
{51, 34, 27, 6, 36, 67, 29, 43, 48, 62} =
{36, 44, 60, 58, 90, 59, 49, 18, 18, 73} =
{88, 35, 18, 83, 63, 78, 96, 83, 59} =
{61, 96, 71, 72, 92, 22, 67, 22, 96, 94} =
{93, 75, 95, 90, 28, 41, 9, 18, 20, 79} =
{72, 97, 95, 0, 81, 55, 37, 60, 20, 54} =
{84, 60, 45, 17, 95, 24, 33, 96, 57} =