(a) How many passwords can you make with 8 characters using Uppercase, Lowercase, digits using at...

(a) How many passwords can you make with 8 characters using Uppercase, Lowercase,
digits using at least one Uppercase, at least one Lowercase and at least one digit?
(b) How many numbers between 1 and 1,000,000 (inclusive) are divisible by at least one of
3,4 and 5?
(c) How many numbers between 1 and 1,000,000 (inclusive) are divisible by at least one of
12, 14, 15?

Expert Solution

Colby Messinger answered 2 years ago

How many passwords are possible? Passwords must: be more than 8 characters long but no more...

How many passwords are possible? Passwords must: be more than 8 characters long but no more than 30 Use lower case, upper case, a number, and a special character [like ~ ! @ # $ % ^ & * ( ) _ + = ? > < . , / ] A mathematical expression is fine. What kind of PMF will be used?

Password consists of five characters: one lowercase letter and four digits 0 – 9. How many...

Password consists of five characters: one lowercase letter and four digits 0 – 9. How many possible combinations for the password are there if digits can be repeated? How many possible combinations for the password are there if digits can not be repeated? What is a percentage of passwords with repeated digits?

a. How many 3-digit numbers can you make using the digits from the set of (3,...

a. How many 3-digit numbers can you make using the digits from the set of (3, 4, 5, 6, 8, 2, 7) without repetitions? b. How many numbers can be made with the digits from the set of (0, 3, 5, 7, 8, 4, 9), which are greater than 0 and less than a thousand (repetitions are allowed)?

6. Passwords are composed from lower- and uppercase letters of the English alphabet,digits and 34 special...

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How many valid 3 digit numbers can you make using the digits 0, 1, 2 and 3 without repeating the digits? How about with repeating?

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You will be given a string, containing both uppercase and lowercase alphabets(numbers are not allowed). You have to print all permutations of string with the added constraint that you can’t change the uppercase alphabets positions. Respond in Python please

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For this problem, Give a BNF grammar for each of the descriptions below. show that you can get a number of positive examples of the language in the constructed grammar and also show that you are not able to get a set of negative examples in the grammar. Create a parse tree for the grammar after. 1). The set of all string consisting of an uppercase letter followed by zero or more additional characters, each of which is either an...

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5. Using only the digits of 1, 4, 5, 8, (a) How many three digit numbers...

5. Using only the digits of 1, 4, 5, 8, (a) How many three digit numbers can be formed? (b) How many odd numbers greater than 10 can be formed? (c) How many even number less than 300 can be formed? Repetition is allowed!

Find the number of passwords that use each of the digits 3,4,5,6,7,8,9 exactly once. IN how...

Find the number of passwords that use each of the digits 3,4,5,6,7,8,9 exactly once. IN how many of the passwords: 1. are the four odd digits consecutive? 2. are no two odd digits consecutive? 3. are the first three digits even? 4. are the three even digits consecutive?

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