Dipanjan said:
Quote:
The example is on Page 32 heading is “A Fairly Random Array” , the final equation that comes up is given as : (N1/N)*(N2/N1)* ….(N(K1)/N(k1)+1)* (N1/(N(K1))
The expression marked in RED seems to be incorrect where it should be [1/N(K1)] as an expression for Pk.

This is correct. The final term Pk is the probability of an item ending up in position k given that it was not placed in positions 1, 2, ..., k  1. After placing items in the first k  1 positions, there are N  (k  1) positions remaining, so the probability of the item being placed in any of the remaining positions is 1 over that number or 1/[N  (k  1)].
See the attachment for a nicely formatted version of the equation.
Thanks for pointing this out Dipanjan!