[Q1] How many 4-letters codes can be formed from the 9 digits {1, 2, ..., 9} if: (a) the order of the letters matters? (b) the order of the letters does not matter? (c) the order of the letters matters and the last digit must be 3? 10211
[Q1] How many 4-letters codes can be formed from the 9 digits {1, 2, ..., 9} if: (a) the order of the letters matters? (b) the order of the letters does not matter? (c) the order of the letters matters and the last digit must be 3? 10211
Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter2: Working With Real Numbers
Section2.7: Problem Solving: Consecutive Integers
Problem 14OE
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![[Q1] How many 4-letters codes can be formed from the 9 digits {1, 2, ..., 9} if: (a) the order of
the letters matters? (b) the order of the letters does not matter? (c) the order of the letters matters
and the last digit must be 3?
102111](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F62ee628f-d033-406d-9098-4491fc871ae7%2Fe4e06386-51cf-42f7-9d03-12073837c864%2Fjh48nb9_processed.jpeg&w=3840&q=75)
Transcribed Image Text:[Q1] How many 4-letters codes can be formed from the 9 digits {1, 2, ..., 9} if: (a) the order of
the letters matters? (b) the order of the letters does not matter? (c) the order of the letters matters
and the last digit must be 3?
102111
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