Elitmus Exam

Anupam appeared in the exam.There were 14 (or may be 15) qstions having 2 options lyrics and gulzar.He did not know the answer. So he is given hint by examiner that if he answer all qstions as lyrics ,he will get 50% correct answer.What are the different sets of qstion paper possible??
(qstion was something like that)

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Elitmus Other Question

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The number is given O such that O is greater than equal to 7. Square of the number O is S. Find the probability that (S-1) is divisible by 24