Generating Random multiple Instances From the library AS3

If someone can help me out with this problem I would greatly apprciate it.  In AS3 I have 1 ball being exported out in actionscript in layer 1 from the library then gets placed on stage when the .swf publishes. here is the code:

The coin movieclip represents the "ball" and its the same movieclip over and over again. (works great no errors)

----code------------

// generates new Coin - Coin is the name of MovieClip in Library

          // remember to export for Actionscript

          var c1:Coin = new Coin();

          var chosenNumsIndex1:uint = chosenNumsIndex;

          trace("chosenNumsIndex1 outside " +chosenNumsIndex1);

          // coin is placed at appropriate x and y coords

          c1.x = kNum[chosenNums[chosenNumsIndex]].x;

          c1.y = kNum[chosenNums[chosenNumsIndex]].y;

          // addChild tells main timeline to display coin once it's generated.

          this.addChild(c1);

What I want to achieve is to have 8+  random movieclips created and linked to the "coin"  so when it gets exported it is not the same ball all the time so this is what I have for that:

var ballsArray:Array = [ball00,ball01,ball02,ball03,ball04,ball05,ball06,ball07,ball08];------- movieclips in the library

Question:  how do I get the coin to read this array  randomly so it doesnt go to "coin movieclip"and just play the one ball i would like it go play the ball of arrays?

thank you very much in advance