How many combinations are there with 4 numbers and letters?

If we assume your letters range from A to Z and your digits from 0 to 9, you have 26 possibilities per letter and 10 per digit. This gives you 26^4*10^4 which is roughly 4 billion and a half.

How many different combinations of 1234 are there?

Thus if you are not allowed to repeat a digit the number of possible 4 digit numbers you can construct from 1,2,3,4 is 4 3 2 1 = 24.

How many possible combinations are there for a 4 digit lock?

10,000 possible combinations

How many 4 digit numbers can be formed using the digits 1 to 9 if repetitions are not allowed?

=2550⋅n! There are 3 condidates for a Classical; 5 for a Mathematical and 4 for a Natural science scholarship.

How many times can you arrange 4 numbers?

But many of those are the same to us now, because we don’t care what order! So, the permutations have 6 times as many possibilites. (Another example: 4 things can be placed in 4! = 4 × 3 × 2 × 1 = 24 different ways, try it for yourself!)

What is the permutation of 4?

Therefore, there are 4· 3 or 12 possible ways to choose two letters from four. ab means that a was chosen first and b second; ba means that b was chosen first and a second; and so on. Thus the number of permutations of 4 different things taken 4 at a time is 4!.