Asked by sara

Consider a sequence of independent Bernoulli trials with p= 0.2

a) what is the expected number of trials to obtain the first success?

for this I thought of it as geometric so 5 trials

b) after the eighth success occurs, what is the expected number of trials to obtain the ninth success?

I don't know how to go about this one?
Answered by Anonymous
a) 1/.2
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