The average age of 40 students of a class is 15…

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The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average is increased by 0.2 year. The average age of the new students is :

  1. A. 15.2 years
  2. B. 16 years
  3. C. 16.2 years
  4. D. 16.4 years

Answer: Option B

Here is complete explanation of The average age of 40 students of a class is 15….

Solution(By ExamCraze Team)

Let the average age of the new students = x years
According to the question,
⇒ 40 × 15 + 10x = 50 × 15.2
⇒ 600 + 10x = 760
⇒ 10x = 160
⇒ x = 16 years

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