I see when x = 2

P(X<=x) = 1 - q^r

P(X<=2)= 1-(0.8)^2

P(X<=2)= 1- 0.64

P(X<=2)= 0.36

xP(X<=x)

2* 0.36 = 0.72

This is my value which is different from the one in the book.

The value in the table is 0.52.

Why is that?

I dont see this in the errata so I am assuming there is something wrong.

**Edited by AShiraz, 11 August 2009 - 04:38 PM.**