For a data set of integers from 1 to 48, $$\binom{48}{4} = 194,580$$ distinct combinations.
And for another data set of 48 integers with 4 subsets of integers from 1 to 12 in each subset, a $$\binom{4\cdot 12}{4} = 194,580$$ as well, but the combinations are NOT distinct because the data set has repeated elements (integers 1 to 12 repeat 4 times).
Here is my question, what general method or formula can be used to count or determine distinct combinations for data set with repeated elements?