a) How many bit strings of length 9 either begin with 1 Os or end with 3 1s? (inclusive or)

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter2: The Integers
Section2.8: Introduction To Cryptography (optional)
Problem 15E: a. Excluding the identity cipher, how many different translation ciphers are there using an alphabet...
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a) How many bit strings of length 9 either begin with 1 Os or end with 3 1s? (inclusive or)
b) Every student in a discrete math class is either a computer science or a mathematics major or is a joint major in these two subjects. How many
students are in the class if there are 31 computer science majors (including joint majors), 24 math majors (including joint majors) and 10 joint majors?
Transcribed Image Text:a) How many bit strings of length 9 either begin with 1 Os or end with 3 1s? (inclusive or) b) Every student in a discrete math class is either a computer science or a mathematics major or is a joint major in these two subjects. How many students are in the class if there are 31 computer science majors (including joint majors), 24 math majors (including joint majors) and 10 joint majors?
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