Permutations
There are 12 athletes at a track meet. How many different ways can they finish first, second, and third?
1320
Determine the value of y, if x is −12.
154
There are 23 students in a homeroom. How many different ways can they be chosen to be elected President, Vice President, and Treasurer?
10626
A lock has a 3-number code made up of 18 numbers. If none of the numbers are allowed to repeat, how many different ways can you choose three different numbers in order for a unique code?
4896
There are 17 students in a homeroom. How many different ways can they be chosen to be elected President, Vice President, Treasurer, and Secretary?
57120
Keshawn is organizing textbooks on his bookshelf. He has a Spanish textbook, a biology textbook, a history textbook, and a writing textbook. How many different ways can he line the textbooks up on his bookshelf?
24