Average - statistics examples

Calculate average of file:
{8, 72, 44, 42, 40, 12, 4, 93, 12} =
{96, 71, 4, 92, 44, 29, 86, 53, 47} =
{44, 14, 55, 74, 20, 49, 31, 28, 56} =
{33, 5, 28, 90, 28, 47, 59, 65, 26} =
{47, 66, 96, 60, 53, 88, 76, 71, 5, 69} =
{50, 44, 46, 84, 0, 80, 33, 100, 99} =
{31, 91, 39, 32, 3, 82, 72, 49, 26, 73} =
{77, 14, 34, 67, 45, 61, 60, 24, 90, 53} =
{44, 0, 22, 5, 66, 44, 87, 28, 6, 82} =
{54, 24, 94, 43, 6, 5, 84, 65, 16} =