The Average Age Of A Board Of 10 Advisors Of A Company Is The Same As It Was 3 Years Ago, On Account Of The Replacement Of One Of The Older Advisors By A Younger Man. How Much Younger Is The New Man Than The Director Whom He Replaced?
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Answer:
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Step-by-step explanation:
given average =average 3 years ago because of replacement
sum of ages+young man age/10=(sum of ages+old man age)-30/10
young man age=old man -30
old man-young man=30
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