SOLUTION: mr. santos has set 8 questions for a math test.
d.) if the most difficult question and the easiest one cannot be set next to each other, how many permutations are there for 8 qu
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-> SOLUTION: mr. santos has set 8 questions for a math test.
d.) if the most difficult question and the easiest one cannot be set next to each other, how many permutations are there for 8 qu
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Question 1173253: mr. santos has set 8 questions for a math test.
d.) if the most difficult question and the easiest one cannot be set next to each other, how many permutations are there for 8 questions?
can u please show me the solution. thank you so much Found 2 solutions by Solver92311, ikleyn:Answer by Solver92311(821) (Show Source):
In my previous post (see the link at the end of this post), I explained that there are 8! = 40320 permutations for 8 items.
I also explained that there are 2*7! = 2 * 5040 = 10080 permutations, where the most difficult and easiest questions
go next to each other (= are neighbors).
Hence, the number of those permutations, where these questions ARE NOT neighbors is the difference
40320 - 10080 = 30240. ANSWER
