Question 12
A student sits tests I, II and III. The student is successful if he passes either tests I and II or tests I and III. The passing probabilities are $p,q,1/2$, respectively. If his probability of success is $1/2$, which of the following can be $p,q$?
Conditional self-study version: assume the three passing events are mutually independent. The source does not state independence; without it, more than one listed pair can be possible. Choose under this explicit assumption.
Conditional self-study version: assume the three passing events are mutually independent. The source does not state independence; without it, more than one listed pair can be possible. Choose under this explicit assumption.