there are 9 digits if 0 is excluded
there are 25 letters if O is excluded
number of possible codes are = 9*25 = 225
press like
An internet code consists of one digit followed by one letter. The number zero and letter...
A password consists of one letter followed by a five-digit number. A) How many passwords are possible if none of the letters or digits can be repeated? B) What is the probability of guessing the password in one trial if there are no restrictions? (To find the probability use the definition of classical probability.)
A warranty identification number for a certain product consists of a letter of the alphabet followed by a seven-digit number. How many possible identification numbers are there if the first digit of the seven-digit number must be nonzero?
A code word consists of 2 letters followed by 7 digits. The first letter must be and an A or a w and the last digit cannot be zero. Find the total number of code words possible for the following conditions. 7) Letters can be repeated but not digits Letter cannot be repeated but digits can a. b. 8) A store manager wishes to display 10 different f food in a row In how many
A password consists of three letters followed by a two-digit number. (a) How many passwords are possible if there are no restrictions? 1757600 (b) How many passwords are possible if none of the letters or digits can be repeated? (c) What is the probability of guessing the password in one trial if there are no restrictions? O A. 0.0000007123 O B. 0.0000005690 O C. 0.2 O D. 0.798816568
A company places an 8-character code on each unit of product. The code consists of 3 digits, the first of which is the number 3, the second must be odd and the remaining digit cannot be 0,1 or 2. The digits are followed by two letters, the first of which cannot be a vowel (A, E, I, O, U) and the second can be any letter except I, O and Z. The digits and letters are with replacement. At the...
The serial number on a dollar bill consists of a letter, followed by eight digits and then a letter. How many different serial numbers are possible if letters and digits cannot be repeated?
Suppose that a "code" consists of 5 digits, none of which is repeated. (A digit is one of the 10 numbers 0,1 2,3 4,5 6,7 8,9.) How many codes are possible?
A password to a computer consists of 6 characters: a digit, a letter, a digit, a letter, a digit, and a letter in that order, where the numbers from 1 through 9 are allowed for digits. How many different passwords are possible? passwords
the access code for a car's security system consists of five digits. the first digit cannot be eight and the last digit must be even. how many different codes are available? (note that zero is considered an even number)
if a license plate consists of 2 letters followed by 4 digits, how many different plates could be created having at least one letter or digit repeated? I know its not 6,760,000