Question 322379
This is a geometric distribution.

A geomteric follows these rules:

1. A trial is repeated until a success occurs

2. The trials are independent.

3. The probability of success is constant for each trial. 

We want the probability that the first success will occur on the xth trial.

In this case, x=8

{{{p*(1-p)^(x-1)}}}

{{{(.02)(.98)^7=.017}}}