The Average Age of The New Students is:

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

  1. 15.2 years
  2.  16 years
  3.  16.2 years
  4.  16.4 years
Desire Adnan Default Asked on 24th July 2015 in Maths.
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1 Answer(s)

Answer: (2) 16 years
Explanation:-
The average age of 40 students of a class = 15 years
Then, the total age of 40 students = 40 x 15 = 600 years.

10 new students admitted and the average increased by 0.2%
Then, the total number  of students = 40 + 10 = 50
And new average = 15 + 0.2 = 15 .2 years
Then, the total age of 50 students = 50 x 15.2
= 760 years.
The total age of new students = 760 – 600 = 160 years
Then, the average age of new students = 160/10 = 16 years
Hence, the answer is (2) 16 years.

Anurag Mishra Professor Answered on 25th July 2015.
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