a security code consists of a persons first and last initial

a security code consists of a persons first and last initials followed by four digits

a) What is the probability of guessing a persons security code on the first try?

b) what is the probability of not guessing a persons security code on the first try

c) you know a persons first name and that the last digit is odd. what is the probabilty of guessing this persons security code on the first try

d) are the statements in a-c examples of classical probability, emirical probability of subjective probability?

Solution

1 2 3 4 5 6 0.00001482250% 3.85% 3.85% 10.00% 10.00% 10.00% 10.00% 99.9999852071% 96.15% 96.15% 90.00% 90.00% 90.00% 90.00% 0.00076923077% 100.00% 3.85% 10.00% 10.00% 10.00% 20.00% Classical Probability