1. How many ways can seven books be arranged on a bookshelf? Decide whether you would use a permutation, a combination, or neither. Next, write the solution using permutation notation or combination notation, if possible, and finally answer the question. 2. Evaluate the expression: (8) (5) (3)
(5) (3) (1)
3. Evaluate the expression: 8Pr
4. Tarot cards are used for telling fortunes, and in a reading, the arrangement of the cards is as important as the cards themselves. How many different readings are possible if six cards are selected from a set of nine tarot cards?
5. A student is asked to answer 12 out of 15 questions on a exam. In how many ways can she select the questions to be answered? (order is not important) classify the problem as a permutation, a combination, or neither.