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 :
A. 15.2 years B. 16 years C. 16.2 years D. 16.4 years Answer: Option BShow Answer
Solution(By Apex 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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