A high school newspaper reported that 77% of students wear their seatbelts while driving.
Eight students chosen at random are asked if
they wear seatbelts. Find the probability that
exactly 4 of them said yes.

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? probability distribution px(x) 6 hours 7 hours 8 hours 9 hours 10 hours 0.62 0.78 пол