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write down the RULES’ NAMES AND find the answers

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write down the RULES’ NAMES AND find the answers. Problem 1. To create a password of 4 characters, if we must choose a consonant for the ?rst character, a letter for the second character, an odd number for the third character and another odd number for the last character. a) How many possible passwords can we create, with repetition? b) How many possible passwords can we create, without repetition? Problem 2. Find the number of different ways that eight test questions can be arranged in order. Problem 3. Find the number of different ways that six test questions can be selected from a test bank of 20 questions (and arranged in order). Problem 4. Find the number of different possible arrangements to arrange 3 identical red books, 6 identical green books and 1 blue book in a row. Problem 5. Find the number of different ways that 3 students can be selected from a class of 20 students to form a 3-member committee. Problem 6. How many ways can we arrange the following word POSSIBILITY ?