A leopard - muscle, claws, jaws, fangs attacks a lone chimp. It's no contest, Chimp loses in minutes. Same case if the leopard attacks a lone sheep.
Leopard attacks a gang of chimps however, the chimps will defend themselves, make noise, bite, hustle the leopard. Chimps will lose one or two but if the leopard does not retreat in time it will also go to Makueni.
Sheep on the other hand... The leopard can pick them out one by one as the sheep bleat aimlessly until it is tired of the routine.
Back to Garissa 4 terrorists attack 800, fairly homogenous, able bodied men and women, in confined spaces. They go on a shooting spree for 10 hours. Even had the time to tell victims to call their relatives and recite their last prayers.
Knowing that the terrorists will never stop shooting until they run out of bullets, would the fatalities and injuries have been fewer if the students had put up resistance? I think so.
IMO Simple strategies like raising alarm, blowing whistles, shouting, causing a rackus and mounting an active resistance would have reduced casualties.
Life is short. Live passionately.