Mary Beth had 20 dollars to spend on 3 gifts. She spent 9 1/4 dollars on gift A and 5 4/5 dollars on gift B.
How much money did she have left for gift C?

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