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Any1Else2005 Group Title

.) Suppose that license plates in a certain municipality come in two forms: (1) three letters (A ... Z) followed by three digits (0 ... 9) or (2) four letters followed by two digits. How many different license plates are possible? 2.) The following problem refers to strings in A, B, ..., Z. How many four-letter strings are there that contain exactly two J's? (Hint: Consider the disjoint cases determined by where the J's are in the string.)

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