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OpenStudy (anonymous):
How many combinations of 4 can you make from [0,1,2,3,4,5,6,7,8,9]?
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OpenStudy (anonymous):
10!/6!
OpenStudy (mathmate):
There are 10!/6! permutations, and 10!/(6!4!) combinations.
OpenStudy (anonymous):
can you repeat numbers?
OpenStudy (anonymous):
if you can: 10*10*10*10=10000 combinations if you can't: 10*9*8*7= 5040 combinations
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