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1.Simplify (n+1)! / (n-1)! 2..A survey found that 10% of Americans believe that they have seen...

1.Simplify (n+1)! / (n-1)!

2..A survey found that 10% of Americans believe that they have seen a UFO. For a sample of 10 people, find the probability that exactly 5 people believe that they have seen a UFO. Use Table B or the binomial probability formula.

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