If you're asking about TANCET, then here is the formula.

Raw score or actual marks are the marks which are allotted for each section according to each correct or incorrect answer.

Normalized marks are the marks which are calculated using the actual score (Out of 100).

Formula to calculate Normalised marks :

40 + (10/S) (R– M)

where M= Mean Marks or total marks obtained from the Part I, Part II and Part III sections of the paper divided by 3.

S= Standard deviation of raw marks

R= Raw marks or total marks obtained from Part I, Part II and Part III sections of the paper