A student loses a mark for every wrong answer and scores 2 marks for every correct answer. If he answers all the 60 questions in an exam and scores 39 marks, how many of them were correct ?

A 31
B 37
C 33
D 27

Correct Answer: 33

Let,   number of correct answers = P,   number of wrong answers = 60-PAccording to question,                                             2P-(60-P)*1 = 39                                             2P-60+P = 39                                             3P = 99                                             P = 33 (Ans)
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#গণিত #Bangladesh Krishi Bank #Krishi Bank - Senior Officer - 20.04.2012

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