Given: 1 x + y = 15. Which of the following are ordered pairs of this equation?
{(16.-3) (15, 0).(14,3)}
{(-3, 14).(0.15).(3.16)}
[(-3, 16).(0.15).(3, 14)}

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.