At a fitness club, 70% of the members are men and 30% of the members are women. If the average age of the men is 30 years and that of the women is 40 years, then what is the average age of all the members?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 33 years.
Weighted Average Age = (Percentage of Men × Average Age of Men + Percentage of Women × Average Age of Women) / 100
Weighted Average Age = (70 × 30 + 30 × 40) / 100
Weighted Average Age = (2100 + 1200) / 100
Weighted Average Age = 3300 / 100
⇒ Weighted Average Age = 33 years