In how many ways can 9 examination papers be arranged so that the best and the worst papers are never together.
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The number of ways 9 papers can be arranged in 9! ways.
The best and work papers as 1 unit = 9! - 1!
= 8!.
The best and worst papers can be arranged themselves in 2! ways.
Total Number of ways = 9! - 8! * 2!
= 362880 - 80640
= 282240.
The best and work papers as 1 unit = 9! - 1!
= 8!.
The best and worst papers can be arranged themselves in 2! ways.
Total Number of ways = 9! - 8! * 2!
= 362880 - 80640
= 282240.
sonu579:
R u sure
Answered by
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Answer:
The number of ways 9 papers can be arranged in 9! ways.
The best and work papers as 1 unit = 9! - 1!
= 8!.
The best and worst papers can be arranged themselves in 2! ways.
Total Number of ways = 9! - 8! * 2!
= 362880 - 80640
= 282240.
Step-by-step explanation:
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