How many different passwords are there that contain only digits and lower-case letters and satisfy the given restrictions? 1) Length is 6 2) Length is 6 and the password must contain at least one digit 3) Length is 6 and the password must contain at least one letter

Q: How many different possible area codes are there if an area code is 3 digits long and cannot contain…

A: From the provided information, An area code is 3 digits long and cannot contain a 0 or have 1 or 9…

Q: a) Suppose in a university, each subject offered to students has a subject code consisting of four…

A: a) In a university each subject offered to students has a subject code consisting of four letters…

Q: A student number system for a county requires that the student number be 6 characters, 4 numbers…

A: We have to find no. Of password possible.

Q: how many different 5-digit codes can be formed if the first digit must be an odd number, the second…

A:

Q: Student Identification Numbers at a certain college must have four letters followed by three numbers…

A: Introduction: It is required to calculate the number of ID’s that the college can issue.

Q: How many 5 letter codes are possible from the first 7 letters of the alphabet? a.) letters can be…

A: Excel is used to obtain the line and bar graph for years of education and years of experience,…

Q: For some particular website, the password must start with one of the letters A, B, or C. Then there…

A:

Q: A number is called “quadary” if each digit is either 0, 1, 2, or 3. How many different 5-digit…

A: Given that a number quadary if each digit is either 0,1,2 or 3. To find the number of  different…

Q: 10 books are to be arranged. (3 structural engineering books, 2 electrical design books and 5…

A: Given : Total number of books = 10 Number of structural engineering books = 3 Number of electrical…

Q: Consider four-letter words to be formed by using the letters: q, w, e, r, t, y, x How many different…

A: We have to find the number of possible four-letter words using the letters q,w,e,r,t,y,x.

Q: The email address password of Engr. Moncada consists of a letter of the English alphabet followed by…

A: As there are 26 letters in alphabet (A-Z) and 10 numbers (0-9). So for password having a letter and…

Q: A computer password must be eight characters long. How many passwords are possible if only the 26…

A: Given Total no.of alphabets=26No.of characters long =8

Q: how many passwords are there if you do not allow repeating digits? b.) How many passwords are there…

A: Since , the passwords are made by using 4 digits from 1-9. Total numbers=9 Password length=4 Our aim…

Q: You are a member of the BCC Math Club. The club has 15 members. a) How many different ways are there…

A: a)given,           club has 15 members here n=15(total numbers)           we need to select the…

Q: How many different passwords exist that consist of 12 characte using uppercase and lowercase…

A:

Q: How many different 3 letter codes can I make that do not contain any repeated letters

A:

Q: Given the numbers 1,3,5,5,7,7,7 a) Find out how many ways the numbers can be arranged. b) Find out…

A:

Q: 3) The access code for the safe in my office consists of 4 digits.The first digit must be odd or…

A:

Q: c) A combination lock has 10 different single digit numbers to choose from and make a number with…

A: The number of total digits to choose in the lock are 10. The number of digits used to open the lock…

Q: Assume a country has 3-digit area codes that all have 0 or 1 as the middle digit, do not have 0 or 1…

A: Solution: From the given information, 3-digit area code should be formed. The first digit do not…

Q: Q)1 a) How many 3 digits passcodes are there if first digit must be a 1 or 2 ?   b) How many 3…

A: Q1) a) There are 10 digits 0,1,2,3,4,5,6,7,8,9. The 3 digit passcodes must be formed such that first…

Q: How many ways are there to select a three character password in such a way that the first two…

A: How many ways are there to select a three character password in such a way thatthe first two…

Q: The sample suggests that the food is safe, but it actually is not safe. type I O type II O not an…

A: Type I error (α) is the probability of rejecting the null hypothesis when it is actually true. Type…

Q: To determine whether car ownership affects a student's academic achievement, random samples of 100…

A: It is assumed that the population variances are not equal.

Q: A computer password is required to be 5 characters long. How many passwords are possible if the…

A: Given dataa computer password is required to be 5 cgaracters longThe password requires 2 letters…

Q: assume that you are trying to transmit a secret code using 3 letter words. if only 5 letters of the…

A: Given only 5 letters of the alphabet can be usedNO.of alphabets =5No.of words should be in secret…

Q: Ahmed must choose a seven-digit PIN number and each digit can be chosen from 0 to 9. How many…

A: We have to find no. of possible pins.

Q: Suppose any digit can be repeated, how many 4-digit PINs are possible if each PIN: a) must end with…

A: As per our guidelines, we are are allowed to answer only first question . Thanks   Suppose any digit…

Q: A safe lock is formed of 2 different letters followed by 4 different digits. How many passwords can…

A:

Q: 6. There is a safe that requires a special access code in order to open. This code is 6 characters…

A:

Q: A certain website wants you to build a 6-character password from the letters a through i, the…

A: Given: The letters will be selected from a through i. Thus, there are a total of 9 letters from a…

Q: a) codes that can be formed b) codes where the number 1 appears at least once c) codes composed of…

A: