Today when I got in my car to go home from work my car decides it just doesnt even want to try and crank at all. The radio worked and everything except the starter. It kinda just hums real soft. It has done this about 4 times in the year that i've had it. Nothing was left on. I just opened the hood and kinda looked at it for a while then went and tryed it a couple more times got back out looked some more and finaly tried again and it started. I dont understand. Maybe i just cant turn the key right

Does anyone know what might be wrong?
Thanks in advance
Aaron

 

low battery, bad ground on the starter, bad starter/solenoid, bad battery connection