4. How many permutations of the letters ABCDEFG contain: a) the string GD? b) the string AFC? c) the strings GD and AFC?
4. How many permutations of the letters ABCDEFG contain: a) the string GD? b) the string AFC? c) the strings GD and AFC?
Chapter8: Sequences, Series,and Probability
Section8.6: Counting Principles
Problem 5ECP: How many permutations of the letters W, X, Y, and Z are possible?
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