Final answer:
The new member is 4 years younger than the average age of the previous members after an older member was replaced by a younger one.
Explanation:
The new member is 4 years younger than the old member who was replaced on the board of directors. Since the average age of the board did not change after this replacement, it implies that the new member is 4 years younger than the average age of the previous members.
To calculate how much younger the new member is compared to the average, you simply need to subtract 4 from the average age of the board members before the replacement.
For example, if the average age of the 10 members before the replacement was 50 years, then the new member is 4 years younger, making the new member's age 46 years.
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