The number of permutations of 7 things taken 7 at a time is 7 factorial, or 5040.
Chat with our AI personalities
120. You do 5*4*3*2*1=120. you multiply the number that you are given for example how many times can books 3 be arranged on a shelf you multiply 3*2*1=6 that is your answer
120
120 ways
In 1,307,674,368,000, or 15! ways.
How many different ways can we arrange 9 objects taken 3 at a time?