Array de 10 numeros de 1 al 100

Suma , media y orden a la inversa



Array
(
    [0] => 17
    [1] => 48
    [2] => 53
    [3] => 53
    [4] => 17
    [5] => 33
    [6] => 30
    [7] => 50
    [8] => 76
    [9] => 20
)
la suma de los numeros es:  397
La media de los nĂºmeros es:   37.7
El array en orden inverso:
Array ( [0] => 20 [1] => 76 [2] => 50 [3] => 30 [4] => 33 [5] => 17 [6] => 53 [7] => 53 [8] => 48 [9] => 17 )