13 p question pleeeaaassseee guys need . will mark brainliest 5 points and pleass guys this is urgent. a student carries out a survey of fav colour. a) can she find the average. give detail b) can she find the average. give detail

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.