A two-digit locker combination has two nonzero digits and no two digits in a combination are the same.
Event A=The first digit is a prime number
Event B=The second digit is a prime number
If a combination is picked at random with each possible locker combination being equally likely, what is P (B|A) expressed in simplest form?
A) 3/8
B) 1/2
C) 4/9
D) 5/9
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