d) BERT, ERNIE, and OSCAR must be together. e). BERT, ERNIE, and OSCAR must not be together. f) they must not be in alphabetical order.
d) BERT, ERNIE, and OSCAR must be together. e). BERT, ERNIE, and OSCAR must not be together. f) they must not be in alphabetical order.
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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Nine stuffed animals, all different, are placed along baby’s toy shelf. How many possible arrangements are there if:

Transcribed Image Text:d) BERT, ERNIE, and OSCAR must be together.
e). BERT, ERNIE, and OSCAR must not be together.
f) they must not be in alphabetical order.
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