A student loses 1 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 ?

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Satt Academy · Accepted Answer

33 -  
ধরি, সঠিক উত্তর দেওয়ার প্রশ্ন সংখ্যা x
⸫ 2x       –       (60       –       x)   ×   1  =  39
⇒ 2x       –       60   +   x  =  39
⇒ 3x  =  99 ⸫ x  =  33

A student loses 1 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 ?

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