We usually write numbers in decimal form (or base 10), meaning numbers are composed using 10 different “digits" {0, 1, .,9}. Sometimes though it is useful to write numbers hexadecimal or base 16. Now there are 16 distinct digits that can be used to form numbers: {0, 1, ..., 9, A, B, C, D, E, F}. So for example, a 3 digit hexadecimal number might be 2B8. Assume that digits and letter can be repeated. .... a. How many 6-digit hexadecimals are there in which the first digit is E or F? b. How many 3-digit hexadecimals start with a letter (A-F) and end with a numeral (0-9)? umeral (0-9) (or c. How many 4-digit hexadecimals start with a letter (A-F) or end with a num both)?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section: Chapter Questions
Problem 22T
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We usually write numbers in decimal form (or base 10), meaning numbers are composed using
10 different “digits" {0, 1, ... , 9}. Sometimes though it is useful to write numbers hexadecimal
or base 16. Now there are 16 distinct digits that can be used to form numbers:
{0, 1, ...,9, A, B, C, D, E, F}. So for example, a 3 digit hexadecimal number might be 2B8.
Assume that digits and letter can be repeated.
a. How many 6-digit hexadecimals are there in which the first digit is E or F?
b. How many 3-digit hexadecimals start with a letter (A-F) and end with a numeral (0-9)?
c. How many 4-digit hexadecimals start with a letter (A-F) or end with a numeral (0-9) (or
both)?
Transcribed Image Text:We usually write numbers in decimal form (or base 10), meaning numbers are composed using 10 different “digits" {0, 1, ... , 9}. Sometimes though it is useful to write numbers hexadecimal or base 16. Now there are 16 distinct digits that can be used to form numbers: {0, 1, ...,9, A, B, C, D, E, F}. So for example, a 3 digit hexadecimal number might be 2B8. Assume that digits and letter can be repeated. a. How many 6-digit hexadecimals are there in which the first digit is E or F? b. How many 3-digit hexadecimals start with a letter (A-F) and end with a numeral (0-9)? c. How many 4-digit hexadecimals start with a letter (A-F) or end with a numeral (0-9) (or both)?
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