For a binomial distribution, the outcomes are either 1 (success) or zero (failure).
The probability of success (outcome =1)of EACH step (out of n steps) is p and remains unchanged over the duration of the experiment.
The probability of failure (outcome =0) of EACH step (out of n steps) is q=1-p and remains unchanged over the duration of the experiment.
The probability of r successes in an n-step experiment is given by:
=nCx p^x q^(n-x)
where nCx = n!/((n-x)!x!)
and x=number of successes
n=1, p=0.15, q=0.85
r=0 (0 success)
=1C0 0.15^0 0.85^1
n=3, x=3, p=0.15
The rest of the exercises are similar.
You can attempt them and return for an answer check.
#2 I get a different answer on this one and when I tried yours it was wrong, I got .0675 and when I worked (e). out I get a 0.6075 but that does not look right. (f) 2.25. I had got 2 answers right when I first done it and I did them all the same way and not sure how I am missing them still.
I don't know to which question 0.0675 referred.
nCr = n!/[(n-r)!(r!)]
For (e), we have
(f) probabilities never exceed 1!
Sorry , I worked them out and they are all wrong. I missed b, e, and f.
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