Sounds to me like your total cholesterol is the 248 and your LDL (bad cholesterol) is 178. Usually your HDL (good cholesterol) is suppose to be above 45-50, the higher the better.
I know they keep lowering the guidelines, but last report I got was..your total should be below 200...LDL below 135....HDL above 40 and Trigs below 150. This is all off the top of my head right now as I didn't look it up. Some Drs. are a bit more number happy then others so an increase here or there doesn't make them nuts and want to shove you on meds. others get nuts if your even slightly over.
Definately try diet and exercise to try and lower your numbers as statins can have some nasty side effects. I tried them once, and will never take them again. I am extremely sensative to meds., so they raised havoc with me.