Colon Frazier
09/03/2024 · Senior High School
Fast food places sometimes advertise that you can buy some number of a particular set of items for a fixed price. The most elaborate one that I can remember was when Arby's offered 5 for \( \$ 5 \) (later \( \$ 5.95, \$ 6.95 \ldots \), It varied how many items were part of the deal, but at the peak, there were 9 options. (I don't recall what they were, but probably something like: soda, curly fries, beef melt, ham melt, turnover, shake, chicken sandwich, mozzarella sticks, potato cakes) 1. How many options are there to order 5 items from 9 choices? Assume that we cannot duplicate any option and that the order is important.
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The number of options to order 5 items from 9 choices is \( P(9, 5) = \frac{9!}{(9-5)!} \).
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