There are 4 possibilities:
No event happens
event A happens, not event B
event B happens, not event A
both events happen
seeing as there is a 50% chance of either event happening, I would assume that all 4 possibilities have an equal chance of happening
so if there are 4 events, then each one is 25% likely.
So the probability if them both occurring is 25%
I think
I got 25% on edmentum ;
The probability that two independent events, each with a 50% chance of occurring, will both occur is 25%. This is calculated using the multiplication rule for independent events. Therefore, the resulting probability is 0.25 or 25%.
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