How do you evaluate #""_10C_8#? Statistics Probability Combinations and Permutations 1 Answer MathFact-orials.blogspot.com May 12, 2017 45 Explanation: The general formula for a combination is: #C_(n,k)=(n!)/((k!)(n-k)!)# with #n="population", k="picks"# and so #C_(10,8)=(10!)/((8!)(10-8)!)=(10!)/(8!2!)=(10xx9xx8!)/(8!xx2)=45# Answer link Related questions At a restaurant, you can choose from 2 appetizers, 4 main courses, and 3 desserts. How many... In general, if you have #m# items of one type and #n# things of another type, how many possible... You have created a (random) 5-digit password for your computer. A hacker tries to break in to... In how many ways can you arrange 5 books in a bookshelf? How do you calculate permutations on the TI-84? In how many ways can you rearrange the letters A, B, C, D, E? There are 7 children in a classroom. In how many ways can they line up for recess? What is a combination? What is the difference between combinations and permutations? There are 9 students in a club. Three students are to be chosen to be on the entertainment... See all questions in Combinations and Permutations Impact of this question 11072 views around the world You can reuse this answer Creative Commons License