There are a total of 122 countries in africa, europe, and north america (as of 2003). europe has twice as many countries as north america, and africa has seven more than europe. how many countries are in each of these three countries?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Someone me! if you’re smart you can solve this!

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.