In a large restaurant an average 60% customers ask for water with their meal. A random sample of 10 customers is selected. Find the probability that, (a) exactly 6 ask for water with their meal(2 points)
(b) less than 9 ask for water with their meal.(2 points)
(c) at least 3 ask for water with their meal.(2 points)
(d) Find the mean and the standard deviation. (3 points)