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