6C4 = 6*5/(2*1) = 15
Chat with our AI personalities
10 * * * * * That is just plain wrong! It depends on how many numbers in each combination but there are 1 combination of 4 numbers out of 4, 4 combinations of 3 numbers out of 4, 6 combinations of 2 numbers out of 4, 4 combinations of 1 number out of 4. A grand total of 15 (= 24-1) combinations.
90
120 combinations using each digit once per combination. There are 625 combinations if you can repeat the digits.
252 combinations, :)
Any 6 from 51 = 18,009,460 combinations