In english class, each student must select 4 short stories from a list of 5 short stories to read. how many different combinations of short stories could a student read? math

The human resources manager at a company records the length, in hours, of one shift at work, x. he creates the probability distribution below. what is the probability that a worker chosen at random works at least 8 hours? 0.62 0.78 0.84 0.96