It's only 1 guy who is obviously taller and stronger than Mary (could be a stranger, an abusive boyfriend, a guy friend, etc) and he's unarmed. However, he's starting to strangle her.
However, Mary knows the moves. What is the % she has in getting out of that before she passes out?
This is one example:
Most Helpful Guy
Tuck the chin (will give you more time)
Don't go to the ground
Go for the genitals
Go for the eyes
Or if you're a strong woman, you could possibly grab his wrist with your opposite hand firmly and pull down locking out his elbow and take your other hand using your palm hit is elbow upwards as hard as you can and just break his elbow 🤷♂️ after that they usually let go (unless they are a psychopath) then you just heel kick them in the side of the knee as hard as you can and run.
Most Helpful Girl
Depends on a lot of factors. If the girl knows what she is doing and has the fortitude to do it, pretty high.