When do i use factorial

FAQs on Factorial. Formula for n Factorial. Factorial of Negative Numbers. Calculation of Factorial. Important Topics.

Natural Numbers. Whole Numbers. Permutations and Combinations. Solved Examples on Factorial. Example 2: Find the value of 5! Solution: 5! Example 3: How many 5-digit numbers can be formed using the digits 1, 2, 5, 7, and 8 in each of which no digit is repeated? Solution: The given 5 digits 1, 2, 5, 7 and 8 should be arranged among themselves in order to get 5-digit numbers.

The number of ways for doing this can be done using the factorial. Example 4: In how many ways can eight people line up from left to right for a group photo? Want to build a strong foundation in Math?

Experience Cuemath and get started. Thanks to the Factorial you can also calculate probabilities. If we have 4 colored pictures and want to hang them on the wall, one after another we can calculate the number of possible combinations:. At this point you may be wondering why Factorial chose that name for its human resources software. Well, Factorial represents growth to the last power, a factorial growth of time, resources, productivity Factorial's human resources software allows the company to optimize its resources to keep growing factorially!

The Factorial function We explain Factorial growth step by step. So what's the difference between them? When should I use factorial and when should I switch to nCr? I know nPr is for when order matters. Add a comment. Active Oldest Votes. Nick Peterson Nick Peterson Show 2 more comments. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. The list is quite long, if the 7 people are called a,b,c,d,e,f and g then the list includes:.

The formula is 7! So there are different ways that 7 people could come 1 st , 2 nd and 3 rd. Just shuffle a deck of cards and it is likely that you are the first person ever with that particular order. It still follows the rule that "the factorial of any number is that number times the factorial of 1 smaller than that number ", because. Examples: 4! We usually say for example 4! Example: 9!