SOLUTION: Each person that works at a company is given a 5-digit code.These employees must enter their codes on a keypad to enter and exit the office building. The company has 80 employees.

Question 1151732: Each person that works at a company is given a 5-digit code.These employees must enter their codes on a keypad to enter and exit the office building. The company has 80 employees.
A) How many codes are possible if there are no restrictions?
B) What is the probability of someone entering a 5-digit code at random and gaining entry to the building?
Found 2 solutions by Edwin McCravy, ikleyn:
Answer by Edwin McCravy(20059)   (Show Source): You can put this solution on YOUR website!

A) The codes are 00000-99999. Since codes 00001-99999 accounts for 99999 codes, we add 1 for 00000 and that makes 100000 codes. B) 1 out of 100000 or 1/100000 or 0.00001 Edwin

Answer by ikleyn(52800)   (Show Source): You can put this solution on YOUR website!
.
Each person that works at a company is given a 5-digit code. These employees must enter their codes on a keypad
to enter and exit the office building. The company has 80 employees.
A) How many codes are possible if there are no restrictions?
B) What is the probability of someone entering a 5-digit code at random and gaining entry to the building?
~~~~~~~~~~~~~~~

            Below is my correction to the solution by Edwin, part (B).

This person "outside" can randomly enter any of 80 different codes, that belong to 80 employees. So the answer in this case for the probability is = = .

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