Why Five People Are Greater Than One?

Suppose there was a runaway train plowing down the railway with five people ahead tied and unable to move on the tracks. The train is headed straight for the five people, while I'm standing some distance off in the train yard near a lever. If I pull the lever, the train I'll switch off to a different set of tracks. Only killing one person, who is also tied to those tracks. If there are five people namely A,B,C,D and E on the main track and Z on the side track, the most common thing to do would be to pull the lever saving five people and only letting one die. The reason being that five people is greater than one: however, I'm not looking at the quantity of people at the moment. For example, if there are five strangers tied on the track ahead unable to move and my mother is the one tied to the tracks on the side. I admit I wouldn't stop to think about the situation, I would just save my mother, killing those five people. I honestly would feel very culpable of allowing anyone to die and would accept the consequences for my actions. The reason being, I would be finding her life more worthy of saving than saving others. If I had the power to change destiny I would ensure
I don't trust the idea of anyone being worth five human lives, similarly as I don't have confidence in five individual's being worth one. In what capacity can a person approve of a judgment on a choice, with settling on a choice their deficient about making. The reason why I did not pull the lever was I didn't see myself being competent in making a decision like that for those individuals. I did not want to feel responsible for killing anybody. Being put in a scenario such as this one complicates the mortality of decision making but due to my beliefs, I feel like I made the right one. I believe that everything happens for an own reason, good or