Out of the 550 students at a school, 16% participate in chorus, 12% participate in theater, and twice as many students as chorus and theater combined participate in sports. How many students
participate in each of: chorus, theater, and sports ?

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.