In an exam, a candidate attempts 20 questions and scores 72 marks. If 5 marks are awarded for each correct answer and 2 marks are deducted for each wrong answer, then how many questions: were answered correctly by him ?

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Q: 111 (CAPF/2020)
In an exam, a candidate attempts 20 questions and scores 72 marks. If 5 marks are awarded for each correct answer and 2 marks are deducted for each wrong answer, then how many questions: were answered correctly by him ?
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question_subject: 

Maths

question_exam: 

CAPF

stats: 

0,14,5,2,2,14,1

keywords: 

{'exam': [0, 0, 0, 1], 'marks': [0, 1, 3, 2], 'many questions': [0, 0, 0, 1], 'questions': [2, 0, 5, 3], 'candidate': [1, 0, 0, 0], 'wrong answer': [0, 0, 0, 1]}