SOLUTION: How many oders can eight actors be listed in the opening credit of a movie if the leading actor must be listed first or last?
Algebra ->
Probability-and-statistics
-> SOLUTION: How many oders can eight actors be listed in the opening credit of a movie if the leading actor must be listed first or last?
Log On
Question 391397: How many oders can eight actors be listed in the opening credit of a movie if the leading actor must be listed first or last? Answer by solver91311(24713) (Show Source):
Take the set of seven actors that excludes the leading actor. There are 7 times 6 times 5 times 4 times 3 times 2 times 1 = 7! ways to arrange those seven actors. Then there are two possibilities for each of those ways, namely the leading actor comes first or the leading actor comes last.
Final tally:
John
My calculator said it, I believe it, that settles it
