How many two-letter codes can be formed using the letters A, B, C, and D? Repeated letters

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How many two-letter codes can be formed using the letters A, B, C, and D? Repeated letters are allowed.

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Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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Question Posted: Apr 04, 2019 10:58 AM

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How many two-letter codes can be formed using the letters A, B, C, and D? Repeated letters

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Precalculus

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