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What happened when you tried?

What you need to do is figure out *what you're trying to do* first. How would you do this in real life, with a real deck of cards?

Pretend you have a friend who...

Think about what this for loop is doing:


for (int i=0; i<3; i++)
{
int randomPosition = r.nextInt(3);
RandomDeck[randomPosition] = Deck[i];
}