Multiple choice

Choose the correct answer from the alternative given. The average age of 15 students of a class is 15 years Out of these the average age of 5 students is 14 years and that of the other 9 students is 16 years. The age of the 15th student is:

  1. 11 years

  2. 4 years

  3. 15 years

  4. 14 years
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Total age of 15 students = 15 * 15 = 225. Sum of 5 students = 5 * 14 = 70. Sum of 9 students = 9 * 16 = 144. Age of 15th student = 225 - (70 + 144) = 225 - 214 = 11.

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