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एक सोसाइटी के 120 सदस्यों की औसत आयु 62.5 वर्ष है | 30 नए सदस्यों को शामिल करने पर औसत आयु 58.2 वर्ष हो जाती है | सोसाइटी में शामिल हुए सदस्यों की औसत आयु कितनी है ?
The average age of 120 members of a society is 62.5 years. On the inclusion of 30 new members, the average age becomes 58.2 years. What is the average age of the members who joined society?
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