3. How many lists of length 3 can be made from the symbols A, B, C, D, E, F if...(a) repetition is allowed.(b)...repetition is not allowed.(c) repetition is not allowed and the list must contain the letter A.(d) . repetition is allowed and the list must contain the letter A..........

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Answered: 3. How many lists of length 3 can be…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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6. 7. With U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15), A = (2, 5, 7, 11, 13), B = $1, 4, 9} and C = {1, 2, 3, 4, 5}. Answer the questions (shown in the image).
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3. How many lists of length 3 can be made from the symbols A, B, C, D, E, F if... (a) repetition is allowed. (b) ... repetition is not allowed. (c) repetition is not allowed and the list must contain the letter A. (d) . repetition is allowed and the list must contain the letter A. ... ... ...