Multiple choice

The average age of a group of 15 persons is 29 years. Among them, the age of two persons is 55 years each. What is the average age of the remaining 13 persons?

  1. 23 years

  2. 28 years

  3. 26 years

  4. 25 years

  5. None of these
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D Correct answer
Explanation

Total age = 15 * 29 = 435. Age of two persons = 55 + 55 = 110. Remaining sum = 435 - 110 = 325. Average of 13 = 325 / 13 = 25.

AI explanation

The total age of all 15 persons is 15 times 29, which equals 435 years. The combined age of the two persons who are 55 years old each is 110 years. Subtracting this from the total gives the sum of the ages of the remaining 13 persons as 325 years. Dividing 325 by 13 yields an average age of 25 years for the remaining persons.

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