In a Zumba class the average age of all the members was 43 5 years I0 members left the class and 6 n...........

Quantitative Aptitude ( CCS) Average

In a Zumba class, the average age of all the members was 43.5 years, I0 members left the class and 6 new members joined. If the average age increased by 2 years and the total age decreased by 110, what was the number of members in the class initially?

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Explanation:

Original number of members in the class = x (let)
Total age of these members = 43.5x years
Total age of (x - 4) members
= (43.5x – 110 years)
According to the question,
43.5x – 110 = (x- 4) × 45.5
= 43.5x – 110 = 45.5x – 182
= 45.5x – 43.5x = 182 – 110
= 2x = 72
= x = 72/2 = 36