Question: Please help.. I will upvote immediately.. Make sure it's the correct one 1. Short Answer Questions: You do not need to justify your answers in

Please help.. I will upvote immediately.. Make sure it's the correct one
1. Short Answer Questions: You do not need to justify your answers in Question 1. (a) How many ways can the letters of the string AAAABBBCDD be arranged? (b) How many strings of length 20 in {0,1} have exactly seven 1's? (c) How many ways are there to place 5 labelled balls into 7 labelled containers so that each container contains at most one ball? (d) List all permutations of the alphabet {A,B,C,D} that begin with B
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