There will be a 1 day ticket, a 2 day ticket, and a weekly ticket, which gives us three so far.
With the three we know, we also know there has to be one for kids and one for adults, so multiply 3 by 2 to get six.
There should be 6 different ticket colors.
Since number 10 had only one word, I guessed 11 is the only one you needed help on. I hope this helped you.