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how to determine the number of unique combinations. Generate unique combinations use multiple formulas 1. Select whether you would like to calculate the number of combinations or the number of permutations using the simple drop-down menu 2.
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Number of combinations n10 k4 is 210 - calculation result using a combinatorial calculator. Enter 30 for Number of sample points in set. In computer security if you want to estimate how strong a password is based on the computing power required to brute force it you calculate the number of permutations not the number of combinations.
For example I have the following list of numbers and now I want to know which combination of numbers in the list sum up to 480 in the following screenshot shown you can see there are five groups of possible combinations that add up equal to 480 such as 30060120 300604080 etc.
N - r where n represents the total number of items and r represents the number of items being chosen at a time. For instance to return the unique First name column A and Last name column B of the winners we enter this formula in E2. Cnr is the number of combinations. Here is a more visual example of how combinations work.
