Answer:
a)
b)
c)
d)
Explanation:
From the question we are told that:
Population percentage
Sample size
Let x =customers ask for water
Let y =customers dose not ask for water with their meal
Generally the equation for y is mathematically given by
Generally the equation for pmf p(x) is mathematically given by
a)
Generally the probability that exactly 6 ask for water is mathematically given by
b)
Generally the probability that less than 9 ask for water with meal is mathematically given by
c)
Generally the probability that at least 3 ask for water with meal is mathematically given by
d)
Generally the mean and standard deviation of sample size is mathematically given by
Mean
Standard deviation