13(a) Consider the alphabet Σ = {a, 3, 7,6}. Answer the following two questions. You must justify your answers, and not simply state numerical values. (i) How many strings of length 5 defined over Σ contain exactly one a and exactly one 3? (ii) How many strings of length 5 defined over Σ contain exactly two y's and at least one d?
13(a) Consider the alphabet Σ = {a, 3, 7,6}. Answer the following two questions. You must justify your answers, and not simply state numerical values. (i) How many strings of length 5 defined over Σ contain exactly one a and exactly one 3? (ii) How many strings of length 5 defined over Σ contain exactly two y's and at least one d?
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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![13(a) Consider the alphabet Σ = {a,3,7,6}. Answer the following two questions. You must
justify your answers, and not simply state numerical values.
(i) How many strings of length 5 defined over Σ contain exactly one a and exactly one 3?
(ii) How many strings of length 5 defined over Σ contain exactly two y's and at least one d?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbcb739e3-e5e6-493c-8f3b-de4cf5a83fbb%2Fa909535c-a218-4371-b849-664096ed6ec4%2Fiecgekq_processed.png&w=3840&q=75)
Transcribed Image Text:13(a) Consider the alphabet Σ = {a,3,7,6}. Answer the following two questions. You must
justify your answers, and not simply state numerical values.
(i) How many strings of length 5 defined over Σ contain exactly one a and exactly one 3?
(ii) How many strings of length 5 defined over Σ contain exactly two y's and at least one d?
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