Introduction to Probability and Statistics

QUESTION 4 a} In a large restaurant an average of 3 out of every 5 customers ask for water with their meal. A random sample of 113 customers is selected. Find the probability that. i} exactly 6 ask for water with their meal. [2 marks} ii} less than 9 ask for water with their meal. [3 marks} h} From all1 a second random sample of 50 customers is selected. Use an appropriate appmximation to calculate the probability that more than 18 customers haying their meal without water. [5 marks}