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When a student, weighing 38 kgs, left a class, the average weight of the remaining 69 students increased by 200 g. What is the average weight of the remaining 69 students?
  • a)
    48 kg
  • b)
    52 kg
  • c)
    59 kg
  • d)
    57 kg
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
When a student, weighing 38 kgs, left a class, the average weight of t...
Let the average weight of the 69 students be A.
∴ total weight of the 69 of them will be 69A.
As question states, the total weight of the class = 69A + 38
When this student is also included, the average weight decreases by 0.2 kg;
⇒ (69A + 38)/70 = A - 0.2
⇒ 69A + 38 = 70A - 14
⇒ 70A - 69A = 38 + 14
⇒ A = 52
∴ Average weight of the remaining 69 students = 52 kg
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When a student, weighing 38 kgs, left a class, the average weight of the remaining 69 students increased by 200 g. What is the average weight of the remaining 69 students?a)48 kgb)52 kgc)59 kgd)57 kgCorrect answer is option 'B'. Can you explain this answer?
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When a student, weighing 38 kgs, left a class, the average weight of the remaining 69 students increased by 200 g. What is the average weight of the remaining 69 students?a)48 kgb)52 kgc)59 kgd)57 kgCorrect answer is option 'B'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about When a student, weighing 38 kgs, left a class, the average weight of the remaining 69 students increased by 200 g. What is the average weight of the remaining 69 students?a)48 kgb)52 kgc)59 kgd)57 kgCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When a student, weighing 38 kgs, left a class, the average weight of the remaining 69 students increased by 200 g. What is the average weight of the remaining 69 students?a)48 kgb)52 kgc)59 kgd)57 kgCorrect answer is option 'B'. Can you explain this answer?.
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