# SOLUTION: Sam had 9 sweaters. If he wore one a day for a week, how many permutations are possible? My math teacher gave me a sheet of permutations to answer at the end of class and witho

Algebra ->  Algebra  -> Permutations -> SOLUTION: Sam had 9 sweaters. If he wore one a day for a week, how many permutations are possible? My math teacher gave me a sheet of permutations to answer at the end of class and witho      Log On

 Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help! Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

 Algebra: Combinatorics and Permutations Solvers Lessons Answers archive Quiz In Depth

 Question 188540: Sam had 9 sweaters. If he wore one a day for a week, how many permutations are possible? My math teacher gave me a sheet of permutations to answer at the end of class and without previous knowledge I am having a very difficult time with these questions. I am asking the one that seems the easiest so that I can try to figure out the remaining. My answer is 36 but I'm not sure if its correct or how I should have gotten there. Thank you.Answer by edjones(7569)   (Show Source): You can put this solution on YOUR website!With permutations the order in which the objects are arrainged is important. nPr Arraingement of r objects selected from a total of n objects. =9P7 =n(n-1)(n-2)*...*(n-r+1) =n!/(n-r)! faster than the line above. =9!/(9-7)! =9!/2! =9*8*7*6*5*4*3 =181440 answer. . Ed