236 Chapter 4 Probability and Counting Rules can a student select 3 of these species to write a report about them? The order of selection is important. 33. 18. Inspecting Restaurants How many different ways can a city health department inspector visit 5 restaurants in a city with 10 restaurants? 34. 19. Word Permutation How many different 4-letter per- mutations can be written from the word hexagon? 20. Cell Phone Models A particular cell phone company offers 4 models of phones, each in 6 different colors and each available with any one of 5 calling plans. How many combinations are possible ? 35 21. ID Cards How many different ID cards can be made if there are 6 digits on a card and no digit can be used 3 more than once? 22. Free-Sample Requests An online coupon service has 13 offers for free samples. How many different requests are possible if a customer must request exactly 3 free samples? How many are possible if the customer may request up to 3 free samples? 23. Ticket Selection How many different ways can 4 tickets be selected from 50 tickets if each ticket wins a different prize? 24. Movie Selections The Foreign Language Club is

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