The average weight of 20 students in a class is increased…

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The average weight of 20 students in a class is increased by 0.75 kg when one student of 35 kg replaced by a new student. Weight of the new student (in kg) is :

  1. A. 35
  2. B. 40
  3. C. 45
  4. D. 50

Answer: Option D

Here is complete explanation of The average weight of 20 students in a class is increased….

Solution(By ExamCraze Team)

Let the weight of the new student = x kg
According to the question,
$$frac{x - 35}{20}$$ = 0.75
⇒ x - 35 = 15
⇒ x = 50

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