A train is pulling 26 passenger cars. The
maintenance crew counts
6 windows in each car. If
it takes 3 minutes to
wash each window, how
many minutes will it take
them to wash all of the
windows?

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.