Test scores on the quantitative portion of the GRE, a graduate school entrance exam, are approximately normal with a mean 151.3 and standard deviation of 8.7. 10. What percentile does a student fall in if he or she has a GRE score of 165 or more?

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.