Question

How many different permutations can be created when anne, Becky,Carlo, dan and Esi line up to buy movie tickets, if Esi always stand behind becky?
If Esi is always behind Becky, we have only 4 independent choices for each position.
So for the first position, there are 4 choices, for the second, 3 choices left, then 2, then 1.
The number of permutations is the product of the 4 numbers.

Related Questions

Which line of dialogue by Anne in The Diary of Anne Frank, Act I reveals that Anne is struggling to... In a 24 km race, during which each runner maintains a constant speed throughout, Alice crosses the f... Read the opening line from Anne Frank and Me: "Right now we are in Westerbork, in Holland. Earlier... This article is primarily about __________. A.how Dr. Becky Cliffe contributes to the understandi...