how to not repeat random array

hey, im new at unity. I got a little problem, im using array to random gameobject, but i want no repeating twice on that gameobject, here my script

" var q1 : GameObject; var q2 : GameObject; var q3 : GameObject; var q4 : GameObject; var q5 : GameObject; var q6 : GameObject; var q7 : GameObject; var q8 : GameObject; var q9 : GameObject; var q10 : GameObject;

var randomQuestion : Array;

function Awake (){

randomQuestion = new Array(q1,q2,q3,q4,q5,q6,q7,q8,q9,q10);

} function Start(){ var chooserandom = Random.Range(0,(randomQuestion.length)); var position = transform.TransformPoint(Random.Range(-3,-3),1,Random.Range(5,5));

Instantiate(randomQuestion[chooserandom],position,Quaternion.identity);

}"