Best Way to Attempt Board Paper

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Best Method to attempt BITSAT 2018

In how many ways can 9examination papers arranged so the best and the worst papers are never together?

In how many ways can 12 papers be arranged if the best and the worst paper never come together?

If the best and the worst paper never appear together,find in how many ways six examination papers can be arranged.

A question paper consists of two parts A and B,part A has 6 questions with one alternate each and part B has 8 questions.Find the number of ways by which one can attempt the paper when at least one question must be attempted from each part.

In how many ways can 7 exmination paopers be arranged so that the best and the worst papers are never together?