How many ways can the letters in BIBBIBIA be arranged so that the 3 I's appear in consecutive positions and the A appears before (i.e., to the left) of III? (Note that the A need not appear immediately before III, e.g., BABBIIIB is allowed, and so is BBBAIIIB.)
How many ways can the letters in BIBBIBIA be arranged so that the 3 I's appear in consecutive positions and the A appears before (i.e., to the left) of III? (Note that the A need not appear immediately before III, e.g., BABBIIIB is allowed, and so is BBBAIIIB.)
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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Transcribed Image Text:How many ways can the letters in BIBBIBIA
be arranged so that the 3 l's appear in
consecutive positions and the A appears
before (i.e., to the left) of II? (Note that the A
need not appear immediately before III, e.g.,
BABBIIIB is allowed, and so is BBBAIIIB.)
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