MCA Exam Numerical Ability Data Sufficiency

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MCA Other Question

In an examination,a student gets 5 marks for every right answer and loses 2 marks for every wrong answer.If he answers 50 questions and get 124 marks, how many are correct answers he attempted? A person can think 100 line of code in 5min and can type 100 lines of code in 10min he takes 5min break for every 10min.in one hour how many pages he can type.