Multiple choice

At the time of marriage a couple had an average age of 28 years. A daughter was born after marriage. Today, after 10 years, the average age of family is 28 years. Find the age of daughter.

  1. 5

  2. 6

  3. 7

  4. 8
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

At marriage, sum of ages = 28 * 2 = 56. After 10 years, sum of ages of parents = 56 + 10 + 10 = 76. Total age of family (3 members) = 28 * 3 = 84. Daughter's age = 84 - 76 = 8.

AI explanation

Ten years ago at marriage, the couple's total age was 2 times 28, or 56 years. Today, the total age of the couple should be 56 plus 20, which is 76 years. The current total age of the family of three is 3 times 28, or 84 years. The daughter's age is the difference between the total family age and the couple's current total age, which is 84 minus 76, giving 8 years.

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