hs: Find each probability using permutations. 15. If six students randomly line up for lunch, what is the probability that they line up from shortest to tallest, if they are all different heights? 16. If the letters in the word NEIGHBOR are randomly rearranged, what is the probability that the arrangement ends with the letter B? Directions: Find each probability using combinations. 17. A committee of three people is to be chosen from a group of 14 people. If Evie is in the group, what is the probability that she will be chosen for the committee? 18. There are 11 boys and 5 girls that tried out to sing a duet in a chorus concert. If the director must choose two, what is the probability that both students chosen are boys?