Michael is organizing a game of chance for his class. he asks each student to pick a ribbon from a bag and then put it back into the bag. the bag has 12 yellow ribbons, 7 red ribbons, and 3 blue ribbons. if jane picks a ribbon, what is the probability that the ribbon will be yellow and what is the likelihood of this event?

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?