is suck! No one can help you here! A bucket contains 3 small red blocks, 5 small yellow blocks, 5 large yellow blocks and 7 large red blocks. If a block is drawn randomly, what is the probability that the block is yellow, given that it is one of the large blocks?

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.