Cathy did a survey in four bird parks and wrote the following observations: park p number of green birds 18 total number of birds 82. park q 39 green birds 88 total birds. park r 38 green birds 64 total birds. park service 22 green birds 50 total birds. based on the survey, which park had the greatest percentage of green birds.

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.