LET a student was awarded in exam = N marks
According to the question,
After re-evaluation his SCORE
N - N x (40/100) = 96
N - 2N/5 = 96
5N - 2N/5 = 96
3N/5 = 96
N = (5 x 96)/3 = 5 x 32
N = 160
So, a student was awarded by 160 marks in examination
REDUCED marks after re-evaluation = 160 - 96 = 64