A deck of cards contains red cards numbered 1,2,3,4, blue cards numbered 1,2,3,4,5,6 and green cards numbered 1,2,3,4,5,6,7,8,9. If a single card is picked at random, what is the probability that the card is blue?

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