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**a)**Assume

*k*car accidents occured in

*n*days. Assume that accidents are equally likely on any day. Let A = event that one accident occured each day. What is

*P(A)*?

The solution is given as below:

**Solution:**[tex]P(A) = \frac{n(n-1)...(n-k+1)}_{n^k}[/tex]

Can someone explain this solution or the process of obtaining this solution in plain english? Thanks.