(A) 4
(B) 5
(C) 6
(D) 7
The answer is: (B) 5
Solution
Out of 4 options only one is correct. So,
There are 20 Multiple Choice Questions (MCQs) in an exam with 4 options in every question. A student attempted the exam just on random guessing. How many questions (according to probability) he will attempt correctly?