Video Keno

Can anyone answer this question honestly or advise how to research....

I am wanting to know if the keno on the Game King video slots is actually drawing 20 random numbers out of 80, as in a live draw with the balls, or is it programed just like most slot machines where in it's simply using RNG technology to pay out whatever %/amount based on your bet amount, and then lights up the correct amount of your numbers to match whatever payback% you are due, thus rendering your specific selection of numbers totally meaningless and all that matters is when you press the play button that hopefully you land on a payout? I ask this because when playing the 20 card keno format, I just can't fathom how the machine constantly hits so many of my numbers but scattered out in such a way that is not paying out anything. I'm hoping to get answers from knowledgeable gaming programmers if you're out there. Thanks in Advance for your time, Oz.