You don't need information.
Because you don't have information.
You go to venture into the unknown.
You don't know what foes you will encounter, you only have some basic idea.
This is an adventure, not math.
Children expression has nothing to do with what you are doing.
Do you know exactly the chance of encountering bear in the woods?
No, you only heard from somebody, who went to hunt that he met them on several occasions.
You heard from somebody else, however, that there are lots of wolves that might show up in those woods.
You hear a mercenary whose tongue is "untied" by the significant amount of mead he already had in the tavern, that there are some thieves hiding in that same forest. But he is still wondering if he really saw bandits or... just shadows, ghosts, mermaids... or bears, standing on their back feet.
You don't have anyone telling you: You have 40% chance to meet a bear in this forest.
It's a role-playing game.
Get into your roles.