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How many passwords can be made from 3 letters followed by 3 digits if no letter or digit can be used more than once?
Wiki User
∙ 11y ago
3!*3!=36
For example, if you want to use the alphabets a,b,c and three digits 1,2,3 you can make the following 36 different passwords (3 letters followed by 3 digits)
abc123
abc132
abc231
abc213
abc312
abc321
acb123
acb132
acb231
acb213
acb312
acb321
bca123
bca132
bca231
bca213
bca312
bca321
bac123
bac132
bac231
bac213
bac312
bac321
cab123
cab132
cab231
cab213
cab312
cab321
cba123
cba132
cab231
cab213
cab312
cab321
Wiki User
∙ 11y ago
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How many numbers has a postcode?
There are up to 3 numbers and up to 5 letters in a UK postcode. One or two letters, followed by one or two digits OR one digit and a letter, followed by a space, followed by one digit, followed by two letters.
How many 5-digit passwords can be made from the seven letters ABCDEFG if any letter occurs at most twice?
2993 of them.
How many license plates can be made using two letters followed by two numbers followed by one letter?
1757600
HOW many different 3-letter passwords are possible if no letter may be repeated?
Using the [modern] Roman alphabet, there are 15600 possible passwords that are not case-sensitive.
How can you create a license plate that consists of two letters followed by three digits The letters cannot repeat but the digits may How many such license plate codes can be formed?
If the license plate code consists of (letter-1)(letter-2)(digit-1)(digit-2)(digit-3), and the letters may not repeat, and the digits may repeat, then: There are 26 choices for (letter-1, and for each of those ... there are 25 choices for (letter-2), and for each of those ... there are 10 choices for (digit-1), and for each of those ... there are 10 choices for (digit-2), and for each of those ... there are 10 choices for (digit-3). The total number of choices is: (26 x 25 x 10 x 10 x 10) = 650 x 1,000 = 650,000
How many numbers has a postcode?
There are up to 3 numbers and up to 5 letters in a UK postcode. One or two letters, followed by one or two digits OR one digit and a letter, followed by a space, followed by one digit, followed by two letters.
How many license plates can be made using either three digits followed by three letters or three letters followed by three digits?
35,152,000 (assuming that 000 is a valid number, and that no letter combinations are disallowed for offensive connotations.) Also, no letters are disallowed because of possible confusion between letters and numbers eg 0 and O.
If you are making passwords and they start with 2 letters from the alphabet and end with 3 digits from numbers 0 through 9 how many possibilities are there?
676,000 possibilities. For case-sensitive passwords, it's 2,704,000 possibilities. Passwords consist of 2 letters and 3 digits. That's 5 places. The first and second places can each hold 1 of 26 possibilities (26 letters), and positions 3, 4, and 5 can each hold 1 of 10 possibilities. The answer is 26 x 26 x 10 x 10 x 10 = 676000. Maybe the passwords can be case-sensitive (i.e. an upper case letter is different from a lower-case letter), then there will be 52 possibilities for each letter - in each of the 1st and 2nd places. This gives the total as 52 * 52 * 10 * 10 * 10 = 2,704,000. Note: An assumption we made is that the passwords are only 5 characters, consisting of 2 letters and 3 digits only. The question didn't say that no other characters are between these letters and numbers. If there are, then we don't have enough info to answer the question.
Which passwords parameter is correct?
Passwords can be letters and /or numbers
How many license plate combinations from 3 digits followed by 3 letters?
There are 26 different letters that can be chosen for each letter. There are 10 different numbers that can be chosen for each number. Since each of the numbers/digits that can be chosen for each of the six "spots" are independent events, we can multiply these combinations using the multiplicative rule of probability.combinations = (# of different digits) * (# of different digits) * (# of different digits) * (# of different letters) * (# of different letters) * (# of different letters) = 10 * 10 * 10 * 26 * 26 * 26 = 103 * 263 = 1000 * 17576 = 17,576,000 different combinations.
What are examples of characters used in passwords?
Individual letters, numbers or special symbols such as @#$%^& found on a computer keyboard.
Australian Passport no has how many digits?
Typically one letter followed by seven numbers.
How many 5-digit passwords can be made from the seven letters ABCDEFG if any letter occurs at most twice?
2993 of them.
How many license plates can be made using two letters followed by two numbers followed by one letter?
1757600
What are the countries that begin with the letter A with 9 digits?
Two countries beginning with the letter A contain 9 letters. The countries are Argentina and Australia.
How many strings can be formed of length 4 from a language containing 10 letters?
In a "language" containing just 10 letters, there are 10,000 four-letter permutations. It's easy to work out if you simply replace the letters with decimal digits 0-9. The first permutation is 0000, followed by 0001, 0002, 0003, ..., 9997, 9998 and 9999.
What must identifiers start with?
the name of an identifier consists of letters and digits but name always starts with a letter.
