How Many Men Would Survive?

20 run towards them and all 15 enemie arrows hit men so really 5 run towards them. One of them attacks one of the enemies and he swung his sword towards the head and when he hit he realized they were wearing some kind of mask/helmet while he was thinking the enemie stabbed him with a dagger straight through the heart. The other four got stabbed to death as well.
You now have 150 men and the 15 enemies coming straight at you
You...