<PRE><B>Question 824371</B>
we need to multiply the following probabilities
1 correct = 1/18
1 correct after 1 correct = 1/17
1 correct after 2 correct = 1/16
1 correct after 3 correct = 1/15
1 correct after 4 correct = 1/14
1 correct after 5 correct = 1/13
1 correct after 6 correct = 1/12
1 correct after 7 correct = 1/11
therefore 8 correct is
(1/18)*(1/17)*(1/16)*(1/15)*(1/14)*(1/13)*(1/12)*(1/11) = 1/1.76432256e9
</PRE>