The answers are in red. I just want to know how to correctly solve this...
Answer:
Given that:
Consider a binomial probability distribution with p=0.2
p = 0.2
1 - p = 1 - 0.2 = 0.8
(a) Determine the probability of exactly three successes when n=4.
n = 4
Using binomial probability formula ,
(n C x)
(4 C 3)
probability = 0.0256
(b) Determine the probability of exactly three successes when n=6
n = 6
Using binomial probability formula ,
(n C x)
(6 C 3)
probability = 0.0819
(c) Determine the probability of exactly three successes when n= 7
n = 7
Using binomial probability formula ,
(n C x)
(7 C 3)
probability = 0.1146
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