One environmental group did a study of recycling habits in a California community

One environmental group did a study of recycling habits in a California community. It found that 73% of the aluminum cans sold in the area were recycled. (Round your answers to four decimal places.)

(a) If 388 cans are sold today, what is the probability that 300 or more will be recycled?
Here the sample size n = 388 so for 300 or more we have observed  proportion = 300/388
(b) Of the 388 cans sold, what is the probability that between 260 and 300 will be recycled?