Question 421359
What is the probability that an Amazon.com visitor
will buy eight books, if we are given the following probabilities 
<pre><font face = "consolas" color = "indigo" size = 4><b>

Let P(8 or more) = x

x        P(x)
0        0.327 
1        0.206	
2        0.07		
3        0.097
4        0.028
5        0.022
6        0.01
7        0.24
8 or more  x
--------------
         1.000

The sum of all probabilities must have sum 1

0.327+0.206+0.07+0.097+0.028+0.022+0.01+0.24+x = 1
                                           1+x = 1
                                             x = 0

So the probability of buying 8 or more is 0.

Edwin</pre>