Q. 53 An examination paper has 150 multiple-choice questions of one mark each, with
each question having four choices. Each incorrect answer fetches-0.25 mark.
Suppose 1000 students choose all their answers randomly with uniform probability.
The sum total of the expected marks obtained by all these students is
(A) 0
(B) 2550
(C) 7525
(D) 9375
Answer: (D)
Explanation:
