If a random variable W only takes on the values 0,1,2,......,n-1 and its Probability Generating Function is p(t) = (t^n - 1)/{n(t - 1)}.
Determine P(W=2).
If a random variable W only takes on the values 0,1,2,......,n-1 and its Probability Generating Function is p(t) = (t^n - 1)/{n(t - 1)}.
Determine P(W=2).
You should know that .
In your question w = 2. The differentiation etc. is left for you to do.