1.  A student was awarded certain marks in an examination. However, after re-evaluation, his marks were reduced by 40% of the marks that were originally awards to him, so that the new score now became 96. How many marks did the student lose after re-evaluation?
A. 58
B. 68
C. 63
D. 56
E. 64

Answer: Option E

Explanation:

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