Multiple choice

In a family, the average age of father and mother is 35 yr. the average age of the father, mother and their only son is 27yr. what is the age of the son

  1. 12 yr

  2. 11 yr

  3. 10.5 yr

  4. 10 yr
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sum of ages of father and mother = 2 * 35 = 70. Sum of ages of father, mother, and son = 3 * 27 = 81. Son's age = 81 - 70 = 11.

AI explanation

The average age of the father and mother is 35 years, so the sum of their ages is 2 multiplied by 35, which is 70 years. The average age of the father, mother, and son is 27 years, making the sum of their ages 3 multiplied by 27, which totals 81 years. The son's age is the difference between the total of all three family members and the parents' total, giving 81 minus 70 = 11 years.

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