Indeed, like HK-47 says:
This brings up another question, did Jango/Boba train with melee combat yet? using a blaster isn't a smart move against a jedi. Usually they would use their ancient blade of a lightsaber, innercore color black, outer color white if I remember correctly.
"Recitation: First, weapon selection is critical. If I see one more idiot attacking a Jedi with a blaster pistol, then I'll kill them myself."
Most Mandalorians wield blasters, so killing a Jedi just got a little bit harder.
But like TalonVII said, no one is invincible. However percentage wise Jedi win 70% of the time.