The probability of Sam passing the exam is 1/4. The probability of Sam passing the exam and Michael passing the driving test is 1/2. What is the probability of Michael passing his driving test?  Choose the correct choice from the following answers:
A) 1/24.  B) 2.  C) 1/3.  D) 2/3.  E) 2/5
1/4 *1/m= 1/2 , 1/m = 2   Answer 2.
<result>B</result>
The probability of Sam passing the exam is 1/4. The probability of Sam passing the exam and Michael passing the driving test is 1/2. What is the probability of Michael passing his driving test?