Ok, Soooo.... It is all about probability. First take down all your info.
A die has 6 different sides. 2 die = 12 sides. 2 different ages. The chances of one of their ages coming up on the first throw is very unlikely, because of all the different combinations you could come up with. Take that into consideration.
Now, you would add up all your information. My guess is that they want to see how you work out the question to see how soon their age would come. Note down that there are many different options.
Hope this helps,
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