The average age

The average age of a 5-member committee is the same as it was 3 years ago, because an old member has been replaced by a new one. Find the difference between the ages of the old and new members.

Final Answer:

d =  12

Step-by-step explanation:

5 a = 4 (a+3)+b 5a = 4a+12+b a = b+12  ba = 12 d = ba  d=12



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statisticsarithmeticUnits of physical quantitiesGrade of the word problem

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