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There are 7 members in a clan. Out of them 3 shares an average age of 20 years. The average age of the rest 4 members is 18 years. Find the average age of the clan after a championship of 365 days.

There are 7 members in a clan. Out of them 3 shares an average age of 20 years. The average age of the rest 4 members is 18 years. Find the average age of the clan after a championship of 365 days. Correct Answer 19.85 years

Total age of the clan = age of the 1st group + age of the 2nd group Total age of the first group = 3 * 20 years = 60 years Total age of the second group = 4 * 18 years = 72 years Total age of the clan = 60 + 72 = 132 years Total age of the clan after 365 days = 132 + 7 * 1 = 132 + 7 = 139 years Average age of the clan after a year = 139/7 = 19.85 years

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