What is the difference between the number of students appeared for the exam from city D in all the years together and number of students appeared for the exam from city B in 2019 and 2020?

Number of students appeared for the exam from city D in all the years together = 4500 + 3600 + 4000 = 12100 Number of students appeared for the exam from city B in 2019 and 2020 = 3600 + 4200 = 7800 Required difference = 12100 – 7800 = 4300

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