The owner of a fitness center conducted a survey using 20 people at the center, selected at random each person was given 30 seconds to do as many push ups as possible and 30 seconds to do as many sit ups as possible the data is shown in the graph

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.