Directions: Determine whether a permutation or combination can be used. Then solve. 19. Three cards from a standard deck of 52 cards are chosen at random. What is the probability that all three cards chosen are hearts? 20. Marissa has a $50, $20, $10, $5, and $1 bill in her wallet. She takes the bills out and randomly line them up. What is the probability that the first bill is greater than $52 21. If the 3-digit security code on the back of a credit card using the digits 0-9 has no repeating digits, what is the probability that the code does not contain any numbers less than 5? 22. There are twelve seniors and eight juniors on the prom committee. If two students are chosen at random to decide on decorations, what is the probability that one is a senior and one is a junior?