The phones continue to be made with the correct working part, so the percentage
continues to increase.
What percent is reached if (round answers to the nearest tenth of a percent):
The next 50 phones are working?
%
The next 100 phones are working?
%
The next 500 phones are working?
%

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.