Multiple choice

The average age of brother and his sister is 44 years. The ratio of their ages is 5 : 3 respectively. What is the age of the sister?

  1. 55

  2. 33

  3. 40

  4. 34

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Average age is 44, so total age = 44 × 2 = 88 years. With ratio 5:3, let ages be 5x and 3x. Then 5x + 3x = 88, giving 8x = 88, so x = 11. Sister's age = 3x = 33 years. Brother would be 55 years (5 × 11).