There are 4 different letters and 4 addressed envelopes. IN how many ways can the letters be

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There are 4 different letters and 4 addressed envelopes. IN how many ways can the letters be put in the envelopes so that at least one letter goes to the correct address ?
a)15 b)16 c)18 d)12

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Discrete and Combinatorial Mathematics An Applied Introduction

ISBN: 978-0201726343

5th edition

Authors: Ralph P. Grimaldi

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Posted Date: Dec 27, 2022 11:13 PM

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There are 4 different letters and 4 addressed envelopes. IN how many ways can the letters be

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Discrete and Combinatorial Mathematics An Applied Introduction

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