.
If to assume that these two events are INDEPENDENT, then the probability that both events will happen is the product
of individual/partial probabilities
P = . = .
Without such assumption, the problem can not be solved, at all.
But validity of the assumption itself is questionable, in real life.
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Let me tell you slightly more about this problem.
Behind each probability problem, there is, actually, an experiment.
At least, a MENTAL experiment.
Now, could you imagine any real life experiment behind THIS problem ?
It is why this problem can be considered as a joke ONLY : ONLY in its joking mode.