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

  1. A computer password must be eight characters long. How many passwords are possible if only the 26 letters of the alphabet are allowed?
    1. Assuming that repetitions of alphabets is possible to create the password then the number of passwords possible
    2. Assuming that repetitions of alphabets is not possible to create the password then the number of passwords possible
  1. A jar contains 4 red marbles numbered 1 to 4 and 10 blue marbles numbered 1 to 10. A marble is drawn at random from the jar. Find the probability the marble is blue or even- numbered.
Math   Statistics-And-Probability   
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