what are all the possible combinations of 4 out of 242,797,824?

nCr(242797824,4) = 144799782100787625509125247069376

Can also write this as 242797824!/(4!*242797820!) = 242797824*242797823*242797822*242797821/4!

$${\frac{{\mathtt{242\,797\,824}}{\mathtt{\,\times\,}}{\mathtt{242\,797\,823}}{\mathtt{\,\times\,}}{\mathtt{242\,797\,822}}{\mathtt{\,\times\,}}{\mathtt{242\,797\,821}}}{{\mathtt{4}}{!}}} = {\mathtt{144\,799\,782\,100\,787\,625\,509\,125\,247\,069\,376}}$$

That's how many combinations there are.  I don't intend to list them all!

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But Alan, there are doubles in there :/

I don't care how many n-tuples there are, I've still no intention of listing them all!!! 

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ROF LOL         

I am going to try and list them.  Here goes nothing

I want all possible combinations of 4 digits from    2 2 2 4 4 7 7 8 9

I get 20 combinations of the digits    

I see we have interpreted the question differently Melody.

You have taken 242,797,824 as a list of single digits.  I've just assumed there are 242 million, 797 thousand, 8 hundred and 24 distinguishable items.

Who knows?!!

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Oh, ok now I see :))