Aritmetický priemer - príklady zo štatistiky

Vypočítajte aritmetický priemer súboru:
{4, 89, 17, 94, 75, 66, 69, 82, 90} =
{81, 23, 55, 83, 93, 72, 25, 21, 98, 34} =
{66, 75, 68, 9, 7, 33, 58, 17, 5, 28} =
{86, 94, 71, 15, 41, 32, 38, 65, 50} =
{88, 33, 19, 49, 19, 19, 83, 36, 47, 7} =
{23, 74, 99, 42, 53, 83, 7, 33, 48, 33} =
{49, 18, 24, 85, 98, 95, 0, 99, 47} =
{39, 55, 96, 54, 66, 29, 82, 50, 74} =
{61, 65, 34, 46, 1, 36, 34, 1, 35, 53} =
{59, 45, 95, 57, 36, 24, 43, 74, 78, 11} =