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## Main Question or Discussion Point

This is a simple example in a text book, I haven't done probability since High school and probability being all too confusing... I cannot seem to overcome this problem. Here's the problem:

The solution is given as below:

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

**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.