Re: dse-2009

Posted by manvi on Jun 24, 2010; 2:54pm
URL: http://discussion-forum.276.s1.nabble.com/dse-2009-tp5196723p5217435.html

how to solve??
The nine digits 1, 2,…, 9 are arranged in random order to form a nine digit
number, which uses each digit exactly once. Find the probability that 1, 2 and 3
appear as neighbours in the increasing order.
a)1 32/36
b)1 33/36
c)1 17/8
d)1 16/18