B looks the most reasonable
Answer: Our required probability is 0.167.
Step-by-step explanation:
Since we have given that
n = 15
Probability of success p = 80% = 0.8
Probability of failure q = 20% = 0.2
We need to find the probability that at least fourteen will work.
So, by Binomial distribution, we get that

Hence, our required probability is 0.167.
A(15) = 3(15)-7 = 45-7 = 38.
SO, (C)38 IS THE ANSWER.
Answer:
it is 2
Step-by-step explanation: