Homework Answers
For the fair coin, we are given here that
P(heads) = P(tails) = 1/2 = 0.5
Therefore the expected number of total tosses required to get the third heads is computed using the expected value of the negative binomial distribution here as:
= n/p = 3/(1/2) = 6
As the expected number of total tosses required to get 3 heads
is 6, therefore total expected number of tails before the 3 heads
would be computed as:
= 6 - 3 = 3
Therefore 3 is the expected number of tails here.
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