Question 312814
A woman buys a lottery ticket every week for which the probabilty of winning at all is 1/10. She continues to buy them until she has won 3 times. X=number of tickets she buys.
<pre><b>
You have that as continuous, which is wrong.  It can't be continuous because
she cannot buy a fraction of a ticket.  When the random variable has to be an
integer the distribution is discrete.  That one is discrete but is not binomial.

Edwin</pre>