12. In an examination, there were 25 questions. 2 marks were
allotted for each correct answer and1/ 2 mark was deducted for
each wrong answer. A student who answered all the 25
questions got 37 1/2 marks. How many questions did he answer
wrong?
(a) 5
(b) 6
(d) 10
(e) 12
(c) 8
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Answer:
He got five wrong
Step-by-step explanation:
This question was asked in IMO 2016
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