Started 3 weeks ago by Khushi bidawatka in
4 Replies
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Replied 1 year ago
Hi Khushi, here's how to approach and solve question 113.Understanding the Information:The question provides a table showing the responses of four students (Vishal, Paresh, Dinesh, and Advait) to 10 questions in an aptitude test. Each question has four options (1, 2, 3, or 4), and the filled circles indicate the option chosen by each student.ย We also know:Scoring:+1 mark for a correct answer.-0.25 mark for an incorrect answer.Key Information: There's only one question where all four students made a mistake, and they all chose the same incorrect option for that question.The Question: If Dinesh attempts Q10 incorrectly, what's the correct answer option for Q1?Solution & ApproachIdentify the Question with All Wrong AnswersWe need to find the row (question number) where all four students have marked the same option, and that option is incorrect. This is the question where everyone made a mistake.Analyze Dinesh's Incorrect Attempt on Q10We're told Dinesh is wrong on Q10. This means the option he marked for Q10 is the incorrect option for that question.Since everyone marked the same wrong option in the question where they all made a mistake, the option Dinesh marked for Q10 is also the incorrect option for that other question.Find the Correct Answer for Q1Now, look at Q1. The correct answer for Q1 will be any of the options that Dinesh did NOT mark for Q10.You are likely confused about why we are focusing on Q10 when the question asks about Q1. The key is the statement: "There is only one question in which all the four students committed a mistake and in this question, all four marked the same option as their answer." This links Dinesh's incorrect answer in Q10 to the question where everyone made the same mistake. By identifying that question and the incorrect option, we can deduce the correct answer for Q1.Let's apply this to the question:From the question, we can observe that Q6 is the only question where all four students marked the same option (option 1).We are told that Dinesh attempts Q10 incorrectly. Let's assume he marked option '2' for Q10.Since Q6 is where everyone made the same mistake, option '1' is incorrect for Q6.As Dinesh marked '2' for Q10 (which is incorrect), we know that '2' cannot be the incorrect option for Q6 (the question where everyone was wrong).Therefore, the incorrect option for Q6 must be '1'.Now, looking at Q1, Dinesh marked option '3'.Since the incorrect option for Q6 (and hence the question where everyone made a mistake) is '1', and we know Dinesh is wrong on Q10, the correct answer for Q1 cannot be '1' or '3'.So, the correct answer options for Q1 are either '2' or '4'.Final Answer: D. 3 or 4Hope you can solve the rest.