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Why is order important in permutations?
If not, they would be combinations.
How many combinations are there in 5 numbers?
It depends on how many values each number is capable of having, and if repetition is allowed, and then if order is important. For example, are you rolling dice, picking Lotto balls, BINGO, etc. I am posting a link to a site called MathsIsFun, which has some good information about Combinations and Permutations.
How many four digit combinations are there in the numbers 1 to 12?
There are 12C4 4 NUMBER combinations. And that equals 12*11*10*9/(4/3/2/1) = 495 combinations. However, some of these, although 4 number combinations consist of 7 digits eg 1, 10, 11, and 12. Are you really sure you want 4-DIGIT combinations?
How many combinations of two letters are possible from three letters?
Starting with three different letters, six two-letter combinations can be made, if the order of the two letters is important. Only three combinations can be made if the order of the two letters is not important. Example: ABC AB AC BA BC CA CB - six variations But if (for your purposes) BA is the same as AB, Then there are only three: AB AC BC
What are combinations called when order does not matter?
They are called combinations!
