In an exam, Mohan gets 4 marks for each correct answer and loses 2 marks for each wrong answer. He attempts 30 questions and obtains 60 marks. The number of questions solved correctly is:
1
15
2
20
3
25
4
10
In an exam, Mohan gets 4 marks for each correct answer and loses 2 marks for each wrong answer. He attempts 30 questions and obtains 60 marks. The number of questions solved correctly is: