depends. Did you check what they did when you were selecting a mission? When choosing a clan memmber to dispatch, wait about a second after highlighting them.One of three things will happen to them. If they jump with their arms raised, then they will most likely succeed. If they just walk in place, there's a normal chance they'll succeed. If they kneel on the ground, they will most likely fail that mission. If you don't remember, just let your clanner fail, and look for the mission another time.