<prompt> A patients lipid profile is as follows, TG - 200 mgdL, Total Cholesterol 300 mgdL, HDL 40 mgdL. Calculate LDL level in this patient.40 mgdL100 mgdL220 mgdL260 mgdL  <response>: Friedwalds equation: Total Cholesterol HDLLDLVLDL Total Cholesterol HDL LDL TG5 we do not measure VLDL, we measure TG -LDL Total cholesterol -HDL- TG5 mgdl -LDL Total cholesterol - HDL - TG2.2 mmolL Total Cholesterol 300 - 40 - 2005 220 mgdl 