Who would the fight the polar bear or the gorilla?

gorrilas have one thing that the polar bear does not and that is the ability to grabbed with his thubms therefore after collaborting with my fellow scientist friends we have decided it would be a 64% chance of the gorrila winning.

Wrong. A polar bear would definitely win the fight because it is the biggest predator on land and is a lot stronger and larger than a grizzly bear. If black bears and brown bears have no problems taking down gorillas, then polar bears would also have no problems too.