Average - statistics examples

Calculate average of file:
{47, 23, 71, 11, 32, 9, 79, 93, 60, 36} =
{69, 80, 54, 80, 12, 83, 43, 91, 37, 80} =
{7, 100, 60, 83, 3, 34, 72, 28, 95} =
{10, 53, 21, 39, 42, 33, 23, 84, 73, 16} =
{28, 64, 33, 39, 21, 36, 71, 5, 2, 97} =
{42, 53, 5, 53, 30, 68, 96, 89, 99, 90} =
{16, 47, 66, 56, 3, 95, 22, 34, 58} =
{64, 10, 74, 41, 25, 12, 98, 26, 22} =
{68, 12, 9, 69, 23, 77, 70, 42, 22, 79} =
{86, 98, 78, 34, 99, 51, 64, 2, 79} =