Task 30: For the probability distribution (below) the value of the parameter r: is : \"E u\" A) 1/2 B) 1/3 C) 1/5 ,9) 115 mm Task 31: c : Twenty percent of undergraduate students carry credit card balances greater than 51099,. Suppose 10 students are selected randomly to be interviewed about credit card usage. What is the probability that at least 2 of the students will have a credit card balance greater than 5 7000 ? A) 0,11 B) 0,27 C) 0,38 mm E) 0,62 Task 32: - . . According to the American Bankers Association, only one in 10 people are dissatised with " local bank. If 7 people are randomly selected, what is the probability that the number clients with their local bank is at most two ? answer mm at while being at distributed. .I..|